<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:6cb207d2-bdff-4c30-8805-9f34f269f82a,g:861cad2c-d65c-4ec9-8074-83d80ab02ff8-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.patriciaacquisitioncorp.com/role/ConsolidatedStatementsofStockholdersEquityDeficit" xlink:type="simple" xlink:href="patr-20251231.xsd#ConsolidatedStatementsofStockholdersEquityDeficit"/>
  <link:definitionLink xlink:role="http://www.patriciaacquisitioncorp.com/role/ConsolidatedStatementsofStockholdersEquityDeficit" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_d81367a8-acd2-42d5-9b73-3bf5a0f83e91" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_c3fef026-30ee-4bfa-a582-80ef31c0200b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_d81367a8-acd2-42d5-9b73-3bf5a0f83e91" xlink:to="loc_us-gaap_StatementTable_c3fef026-30ee-4bfa-a582-80ef31c0200b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_3fdfc688-e967-4d29-8210-6afed49ba76c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_c3fef026-30ee-4bfa-a582-80ef31c0200b" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_3fdfc688-e967-4d29-8210-6afed49ba76c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_3fdfc688-e967-4d29-8210-6afed49ba76c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_3fdfc688-e967-4d29-8210-6afed49ba76c" xlink:to="loc_us-gaap_EquityComponentDomain_3fdfc688-e967-4d29-8210-6afed49ba76c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_2e3d8d9d-46f0-4dfb-8910-167ef69796ae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_3fdfc688-e967-4d29-8210-6afed49ba76c" xlink:to="loc_us-gaap_EquityComponentDomain_2e3d8d9d-46f0-4dfb-8910-167ef69796ae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_b761a785-4184-4187-8a53-b72a14299479" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_2e3d8d9d-46f0-4dfb-8910-167ef69796ae" xlink:to="loc_us-gaap_CommonStockMember_b761a785-4184-4187-8a53-b72a14299479" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_354e35b6-69f7-4ab3-854f-392589f128ec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_2e3d8d9d-46f0-4dfb-8910-167ef69796ae" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_354e35b6-69f7-4ab3-854f-392589f128ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivablesFromStockholderMember_a8767dfd-ba13-4c58-8a43-39426f5ee36e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReceivablesFromStockholderMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_2e3d8d9d-46f0-4dfb-8910-167ef69796ae" xlink:to="loc_us-gaap_ReceivablesFromStockholderMember_a8767dfd-ba13-4c58-8a43-39426f5ee36e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019c79c8-b000-72b4-9148-0c461744946c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_2e3d8d9d-46f0-4dfb-8910-167ef69796ae" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019c79c8-b000-72b4-9148-0c461744946c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_0ce10f51-dbbc-4624-9825-2cf28b5f78f3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_2e3d8d9d-46f0-4dfb-8910-167ef69796ae" xlink:to="loc_us-gaap_RetainedEarningsMember_0ce10f51-dbbc-4624-9825-2cf28b5f78f3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_IssuanceOfCommonStockDescriptionAxis_019b59a7-6aaf-7c18-a0fa-c04959f02547" xlink:href="patr-20251231.xsd#patr_IssuanceOfCommonStockDescriptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_c3fef026-30ee-4bfa-a582-80ef31c0200b" xlink:to="loc_patr_IssuanceOfCommonStockDescriptionAxis_019b59a7-6aaf-7c18-a0fa-c04959f02547" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_IssuanceOfCommonStockDescriptionDomain_019b59a7-6aaf-7c18-a0fa-c04959f02547_default" xlink:href="patr-20251231.xsd#patr_IssuanceOfCommonStockDescriptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_patr_IssuanceOfCommonStockDescriptionAxis_019b59a7-6aaf-7c18-a0fa-c04959f02547" xlink:to="loc_patr_IssuanceOfCommonStockDescriptionDomain_019b59a7-6aaf-7c18-a0fa-c04959f02547_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_IssuanceOfCommonStockDescriptionDomain_019b59a7-9768-780d-bbda-8d3ba78ba671" xlink:href="patr-20251231.xsd#patr_IssuanceOfCommonStockDescriptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_patr_IssuanceOfCommonStockDescriptionAxis_019b59a7-6aaf-7c18-a0fa-c04959f02547" xlink:to="loc_patr_IssuanceOfCommonStockDescriptionDomain_019b59a7-9768-780d-bbda-8d3ba78ba671" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_IssuanceForOfferingMember_019b59a9-9112-7766-b405-e068dc3eb761" xlink:href="patr-20251231.xsd#patr_IssuanceForOfferingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_patr_IssuanceOfCommonStockDescriptionDomain_019b59a7-9768-780d-bbda-8d3ba78ba671" xlink:to="loc_patr_IssuanceForOfferingMember_019b59a9-9112-7766-b405-e068dc3eb761" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_IssuanceForSalesAgreementAndEquityDistributionAgreementMember_019b59a8-6b71-701c-9150-2b1452c276ed" xlink:href="patr-20251231.xsd#patr_IssuanceForSalesAgreementAndEquityDistributionAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_patr_IssuanceOfCommonStockDescriptionDomain_019b59a7-9768-780d-bbda-8d3ba78ba671" xlink:to="loc_patr_IssuanceForSalesAgreementAndEquityDistributionAgreementMember_019b59a8-6b71-701c-9150-2b1452c276ed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_EquityDistributionAgreement2025Member_019b8c4e-6269-7fe7-9c48-a7e7a1fc6c5d" xlink:href="patr-20251231.xsd#patr_EquityDistributionAgreement2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_patr_IssuanceOfCommonStockDescriptionDomain_019b59a7-9768-780d-bbda-8d3ba78ba671" xlink:to="loc_patr_EquityDistributionAgreement2025Member_019b8c4e-6269-7fe7-9c48-a7e7a1fc6c5d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConversionOfStockByUniqueDescriptionAxis_6edb5667-63bf-4e49-bda4-ec76ba53c310" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConversionOfStockByUniqueDescriptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_c3fef026-30ee-4bfa-a582-80ef31c0200b" xlink:to="loc_us-gaap_ConversionOfStockByUniqueDescriptionAxis_6edb5667-63bf-4e49-bda4-ec76ba53c310" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConversionOfStockNameDomain_6edb5667-63bf-4e49-bda4-ec76ba53c310_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConversionOfStockNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConversionOfStockByUniqueDescriptionAxis_6edb5667-63bf-4e49-bda4-ec76ba53c310" xlink:to="loc_us-gaap_ConversionOfStockNameDomain_6edb5667-63bf-4e49-bda4-ec76ba53c310_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConversionOfStockNameDomain_86534b50-5b31-4a5c-bc6b-51550784cbf3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConversionOfStockNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConversionOfStockByUniqueDescriptionAxis_6edb5667-63bf-4e49-bda4-ec76ba53c310" xlink:to="loc_us-gaap_ConversionOfStockNameDomain_86534b50-5b31-4a5c-bc6b-51550784cbf3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_ConversionOfConvertibleNoteAndDerivativeMember_56daa2c9-2902-4871-b5f5-b5bdfb6ba2a5" xlink:href="patr-20251231.xsd#patr_ConversionOfConvertibleNoteAndDerivativeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConversionOfStockNameDomain_86534b50-5b31-4a5c-bc6b-51550784cbf3" xlink:to="loc_patr_ConversionOfConvertibleNoteAndDerivativeMember_56daa2c9-2902-4871-b5f5-b5bdfb6ba2a5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_ConversionOfWarrantsMember_019b59ab-cf03-7bcd-8cb3-00f660a01c5e" xlink:href="patr-20251231.xsd#patr_ConversionOfWarrantsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConversionOfStockNameDomain_86534b50-5b31-4a5c-bc6b-51550784cbf3" xlink:to="loc_patr_ConversionOfWarrantsMember_019b59ab-cf03-7bcd-8cb3-00f660a01c5e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bede6cdc-81bd-4fd3-a4f6-bd07b0b2c17f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_d81367a8-acd2-42d5-9b73-3bf5a0f83e91" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bede6cdc-81bd-4fd3-a4f6-bd07b0b2c17f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesOutstanding_8aa96510-36ec-4a2e-97b7-99e73412a2d4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bede6cdc-81bd-4fd3-a4f6-bd07b0b2c17f" xlink:to="loc_us-gaap_SharesOutstanding_8aa96510-36ec-4a2e-97b7-99e73412a2d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_10e7f2c9-ac72-4357-a4fa-311397f695e7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bede6cdc-81bd-4fd3-a4f6-bd07b0b2c17f" xlink:to="loc_us-gaap_StockholdersEquity_10e7f2c9-ac72-4357-a4fa-311397f695e7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_9526dc5b-82c2-4b30-8da1-0d0e75527243" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bede6cdc-81bd-4fd3-a4f6-bd07b0b2c17f" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_9526dc5b-82c2-4b30-8da1-0d0e75527243" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_91bb871b-7c76-4dde-b963-269b301892c6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bede6cdc-81bd-4fd3-a4f6-bd07b0b2c17f" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_91bb871b-7c76-4dde-b963-269b301892c6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts_2cf593ae-e20e-45fa-a45c-ee948f034085" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bede6cdc-81bd-4fd3-a4f6-bd07b0b2c17f" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts_2cf593ae-e20e-45fa-a45c-ee948f034085" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_33b9a684-4835-40d7-8062-35cd257e8204" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bede6cdc-81bd-4fd3-a4f6-bd07b0b2c17f" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_33b9a684-4835-40d7-8062-35cd257e8204" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities_2e29f9c9-438b-4723-853e-1273bfe518b8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bede6cdc-81bd-4fd3-a4f6-bd07b0b2c17f" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities_2e29f9c9-438b-4723-853e-1273bfe518b8" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_019b066f-7dd1-7444-9fad-1bcf6338968e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bede6cdc-81bd-4fd3-a4f6-bd07b0b2c17f" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_019b066f-7dd1-7444-9fad-1bcf6338968e" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_AdjustmentsToReceivablesFromStockholderInterestOnRecourseDebt_595929b5-948e-4f7b-8ee8-d3faa3efddb3" xlink:href="patr-20251231.xsd#patr_AdjustmentsToReceivablesFromStockholderInterestOnRecourseDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bede6cdc-81bd-4fd3-a4f6-bd07b0b2c17f" xlink:to="loc_patr_AdjustmentsToReceivablesFromStockholderInterestOnRecourseDebt_595929b5-948e-4f7b-8ee8-d3faa3efddb3" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_AdjustmentsToReceivablesFromStockholderInterestAndForgivenessOnRecourseDebt_014bebbb-5482-462e-b1ce-e04dd2d4fc00" xlink:href="patr-20251231.xsd#patr_AdjustmentsToReceivablesFromStockholderInterestAndForgivenessOnRecourseDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bede6cdc-81bd-4fd3-a4f6-bd07b0b2c17f" xlink:to="loc_patr_AdjustmentsToReceivablesFromStockholderInterestAndForgivenessOnRecourseDebt_014bebbb-5482-462e-b1ce-e04dd2d4fc00" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_StockIssuedDuringPeriodSharesWarrantIssued_a15f3230-daa5-460c-9322-f71c75b507db" xlink:href="patr-20251231.xsd#patr_StockIssuedDuringPeriodSharesWarrantIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bede6cdc-81bd-4fd3-a4f6-bd07b0b2c17f" xlink:to="loc_patr_StockIssuedDuringPeriodSharesWarrantIssued_a15f3230-daa5-460c-9322-f71c75b507db" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_StockIssuedDuringPeriodValueWarrantIssued_78ffa2c7-d9a9-4c1d-ae15-7ba6fbd0c6cc" xlink:href="patr-20251231.xsd#patr_StockIssuedDuringPeriodValueWarrantIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bede6cdc-81bd-4fd3-a4f6-bd07b0b2c17f" xlink:to="loc_patr_StockIssuedDuringPeriodValueWarrantIssued_78ffa2c7-d9a9-4c1d-ae15-7ba6fbd0c6cc" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesAcquisitions_019b8c50-ded1-77b7-b37e-9d163ceb60d2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesAcquisitions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bede6cdc-81bd-4fd3-a4f6-bd07b0b2c17f" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesAcquisitions_019b8c50-ded1-77b7-b37e-9d163ceb60d2" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueAcquisitions_019b8c50-ded1-7d34-b5e4-3dd1cde521ac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueAcquisitions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bede6cdc-81bd-4fd3-a4f6-bd07b0b2c17f" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueAcquisitions_019b8c50-ded1-7d34-b5e4-3dd1cde521ac" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_AdjustmentsToAdditionalPaidInCapitalShortSwingProfitDisgorgement_019b8c53-f959-76b0-9738-34bf6f48b7ac" xlink:href="patr-20251231.xsd#patr_AdjustmentsToAdditionalPaidInCapitalShortSwingProfitDisgorgement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bede6cdc-81bd-4fd3-a4f6-bd07b0b2c17f" xlink:to="loc_patr_AdjustmentsToAdditionalPaidInCapitalShortSwingProfitDisgorgement_019b8c53-f959-76b0-9738-34bf6f48b7ac" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_3c4ceb2b-ddf7-49aa-a6c7-7543a9c2d05d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bede6cdc-81bd-4fd3-a4f6-bd07b0b2c17f" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_3c4ceb2b-ddf7-49aa-a6c7-7543a9c2d05d" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_7e44ca99-2810-429c-8b8e-9ceb9ae816c3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bede6cdc-81bd-4fd3-a4f6-bd07b0b2c17f" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_7e44ca99-2810-429c-8b8e-9ceb9ae816c3" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_248e36de-ad9b-428b-b054-e42b87d9129a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bede6cdc-81bd-4fd3-a4f6-bd07b0b2c17f" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_248e36de-ad9b-428b-b054-e42b87d9129a" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition_dab0de01-5311-49de-92d2-f132bc511709" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bede6cdc-81bd-4fd3-a4f6-bd07b0b2c17f" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition_dab0de01-5311-49de-92d2-f132bc511709" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019b8c58-1a8e-7859-9a06-23d454a99b24" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bede6cdc-81bd-4fd3-a4f6-bd07b0b2c17f" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019b8c58-1a8e-7859-9a06-23d454a99b24" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_11e1dc1f-a80e-4d44-951f-657e7cbd0ba8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_bede6cdc-81bd-4fd3-a4f6-bd07b0b2c17f" xlink:to="loc_us-gaap_NetIncomeLoss_11e1dc1f-a80e-4d44-951f-657e7cbd0ba8" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_9cb34068-c1fb-4778-844a-b44be469df48" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesOutstanding_26a64068-0b0a-4df2-8db5-31d2e69fe4e0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharesOutstanding"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.patriciaacquisitioncorp.com/role/NATUREOFOPERATIONSANDBUSINESSDetails" xlink:type="simple" xlink:href="patr-20251231.xsd#NATUREOFOPERATIONSANDBUSINESSDetails"/>
  <link:definitionLink xlink:role="http://www.patriciaacquisitioncorp.com/role/NATUREOFOPERATIONSANDBUSINESSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_patr_NatureofOperationsDetailsLineItems_5cc7561a-886b-4cb2-b843-4cf8bb1d58a6" xlink:href="patr-20251231.xsd#patr_NatureofOperationsDetailsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_NatureofOperationsDetailsTable_569e4db8-4771-46ba-bbfb-af10a36ac9b3" xlink:href="patr-20251231.xsd#patr_NatureofOperationsDetailsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_patr_NatureofOperationsDetailsLineItems_5cc7561a-886b-4cb2-b843-4cf8bb1d58a6" xlink:to="loc_patr_NatureofOperationsDetailsTable_569e4db8-4771-46ba-bbfb-af10a36ac9b3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_1e1f4484-7000-4826-9f51-9da87fdc10c0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_patr_NatureofOperationsDetailsTable_569e4db8-4771-46ba-bbfb-af10a36ac9b3" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_1e1f4484-7000-4826-9f51-9da87fdc10c0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_1e1f4484-7000-4826-9f51-9da87fdc10c0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_1e1f4484-7000-4826-9f51-9da87fdc10c0" xlink:to="loc_us-gaap_EquityComponentDomain_1e1f4484-7000-4826-9f51-9da87fdc10c0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_7e87272f-8e25-46cb-9fdf-da0c5f8debcb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_1e1f4484-7000-4826-9f51-9da87fdc10c0" xlink:to="loc_us-gaap_EquityComponentDomain_7e87272f-8e25-46cb-9fdf-da0c5f8debcb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_cd7d83af-4f89-48eb-a66d-dd2a65cc32ee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_7e87272f-8e25-46cb-9fdf-da0c5f8debcb" xlink:to="loc_us-gaap_CommonStockMember_cd7d83af-4f89-48eb-a66d-dd2a65cc32ee" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesIssued_b207f9be-7600-411b-8d16-a5977e7d3848" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_patr_NatureofOperationsDetailsLineItems_5cc7561a-886b-4cb2-b843-4cf8bb1d58a6" xlink:to="loc_us-gaap_SharesIssued_b207f9be-7600-411b-8d16-a5977e7d3848" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_77ffc771-4591-4f59-b1dd-02c2df622df3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_patr_NatureofOperationsDetailsLineItems_5cc7561a-886b-4cb2-b843-4cf8bb1d58a6" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_77ffc771-4591-4f59-b1dd-02c2df622df3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharePrice_a65ea19a-c4cf-4302-b661-92a7e16dd420" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_patr_NatureofOperationsDetailsLineItems_5cc7561a-886b-4cb2-b843-4cf8bb1d58a6" xlink:to="loc_us-gaap_SharePrice_a65ea19a-c4cf-4302-b661-92a7e16dd420" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceInitialPublicOffering_edbf3684-cde5-40fb-b603-f2f8e380a3b3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceInitialPublicOffering"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_patr_NatureofOperationsDetailsLineItems_5cc7561a-886b-4cb2-b843-4cf8bb1d58a6" xlink:to="loc_us-gaap_ProceedsFromIssuanceInitialPublicOffering_edbf3684-cde5-40fb-b603-f2f8e380a3b3" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.patriciaacquisitioncorp.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESNarrativeDetails" xlink:type="simple" xlink:href="patr-20251231.xsd#SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.patriciaacquisitioncorp.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b91bc-b7b8-7acb-bddb-987c46ca3244" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019b91bc-20b8-7782-bf20-3765344a65d4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b91bc-b7b8-7acb-bddb-987c46ca3244" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019b91bc-20b8-7782-bf20-3765344a65d4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019cd14e-7aa1-7d56-92d1-ee3202d6f987" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019b91bc-20b8-7782-bf20-3765344a65d4" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019cd14e-7aa1-7d56-92d1-ee3202d6f987" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cd14e-7aa1-7d56-92d1-ee3202d6f987_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019cd14e-7aa1-7d56-92d1-ee3202d6f987" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cd14e-7aa1-7d56-92d1-ee3202d6f987_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cd14e-7aa1-75f2-9fb2-1bff295345d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019cd14e-7aa1-7d56-92d1-ee3202d6f987" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cd14e-7aa1-75f2-9fb2-1bff295345d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OfficeEquipmentMember_019cd14e-7aa1-72b7-9833-4936eb3a92b4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OfficeEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cd14e-7aa1-75f2-9fb2-1bff295345d7" xlink:to="loc_us-gaap_OfficeEquipmentMember_019cd14e-7aa1-72b7-9833-4936eb3a92b4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_RobotAssetMember_019cd14e-7aa1-76e8-b760-9aea7fb245b5" xlink:href="patr-20251231.xsd#patr_RobotAssetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cd14e-7aa1-75f2-9fb2-1bff295345d7" xlink:to="loc_patr_RobotAssetMember_019cd14e-7aa1-76e8-b760-9aea7fb245b5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019cd14e-a59b-710c-9e61-7a3c5d554f8b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019b91bc-20b8-7782-bf20-3765344a65d4" xlink:to="loc_srt_RangeAxis_019cd14e-a59b-710c-9e61-7a3c5d554f8b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cd14e-a59b-710c-9e61-7a3c5d554f8b_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019cd14e-a59b-710c-9e61-7a3c5d554f8b" xlink:to="loc_srt_RangeMember_019cd14e-a59b-710c-9e61-7a3c5d554f8b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cd14e-a59b-7253-a10c-f9c05c30fa44" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019cd14e-a59b-710c-9e61-7a3c5d554f8b" xlink:to="loc_srt_RangeMember_019cd14e-a59b-7253-a10c-f9c05c30fa44" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019cd14e-a59b-70f4-ba8e-2e79bd05e32d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019cd14e-a59b-7253-a10c-f9c05c30fa44" xlink:to="loc_srt_MinimumMember_019cd14e-a59b-70f4-ba8e-2e79bd05e32d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019cd14e-a59b-7970-9778-908e121205eb" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019cd14e-a59b-7253-a10c-f9c05c30fa44" xlink:to="loc_srt_MaximumMember_019cd14e-a59b-7970-9778-908e121205eb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfOperatingSegments_019cd14d-9da1-75f7-b16e-fd9d135b1cb8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfOperatingSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b91bc-b7b8-7acb-bddb-987c46ca3244" xlink:to="loc_us-gaap_NumberOfOperatingSegments_019cd14d-9da1-75f7-b16e-fd9d135b1cb8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportableSegments_019cd14d-9da1-766c-9e29-f24a8d20df96" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfReportableSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b91bc-b7b8-7acb-bddb-987c46ca3244" xlink:to="loc_us-gaap_NumberOfReportableSegments_019cd14d-9da1-766c-9e29-f24a8d20df96" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsAndShortTermInvestments_019cd14d-9da1-7d53-a800-6f7be98e9c0d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsAndShortTermInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b91bc-b7b8-7acb-bddb-987c46ca3244" xlink:to="loc_us-gaap_CashCashEquivalentsAndShortTermInvestments_019cd14d-9da1-7d53-a800-6f7be98e9c0d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019cd14d-9da1-7e6b-8e99-2da88e44c5a0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b91bc-b7b8-7acb-bddb-987c46ca3244" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019cd14d-9da1-7e6b-8e99-2da88e44c5a0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_019cd14d-9da1-719b-ad1b-b22c1e94d8f2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b91bc-b7b8-7acb-bddb-987c46ca3244" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_019cd14d-9da1-719b-ad1b-b22c1e94d8f2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_019cd14e-2e30-7e78-9bd4-bb86d069ee5e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b91bc-b7b8-7acb-bddb-987c46ca3244" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_019cd14e-2e30-7e78-9bd4-bb86d069ee5e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_019cd14e-7aa1-7beb-8003-dc2c892932e6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b91bc-b7b8-7acb-bddb-987c46ca3244" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_019cd14e-7aa1-7beb-8003-dc2c892932e6" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_019cd14e-a59b-7f09-aaef-7a04ecf6a3df" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b91bc-b7b8-7acb-bddb-987c46ca3244" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_019cd14e-a59b-7f09-aaef-7a04ecf6a3df" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_019cd14e-cb39-7745-8b36-64f4871e731d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GoodwillImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b91bc-b7b8-7acb-bddb-987c46ca3244" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_019cd14e-cb39-7745-8b36-64f4871e731d" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_HostingArrangementPeriod_019cd60f-e0d9-765a-85f7-1e89485a06e8" xlink:href="patr-20251231.xsd#patr_HostingArrangementPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b91bc-b7b8-7acb-bddb-987c46ca3244" xlink:to="loc_patr_HostingArrangementPeriod_019cd60f-e0d9-765a-85f7-1e89485a06e8" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredOfferingCosts_019cd14e-e02b-703f-bf7d-532c50fb8269" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredOfferingCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b91bc-b7b8-7acb-bddb-987c46ca3244" xlink:to="loc_us-gaap_DeferredOfferingCosts_019cd14e-e02b-703f-bf7d-532c50fb8269" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_019cd14f-22fa-7ad1-9e6a-31a138400256" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b91bc-b7b8-7acb-bddb-987c46ca3244" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_019cd14f-22fa-7ad1-9e6a-31a138400256" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdvertisingExpense_019cd14f-5b42-718f-b8e5-e862b341ddab" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdvertisingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b91bc-b7b8-7acb-bddb-987c46ca3244" xlink:to="loc_us-gaap_AdvertisingExpense_019cd14f-5b42-718f-b8e5-e862b341ddab" xlink:type="arc" order="12"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.patriciaacquisitioncorp.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESSchedulesofConcentrationofRiskbyRiskFactorDetails" xlink:type="simple" xlink:href="patr-20251231.xsd#SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESSchedulesofConcentrationofRiskbyRiskFactorDetails"/>
  <link:definitionLink xlink:role="http://www.patriciaacquisitioncorp.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESSchedulesofConcentrationofRiskbyRiskFactorDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskLineItems_019b91b5-9ea0-7b3f-a165-5bfa4bd1e0b8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTable_019b91b5-7632-7bb3-8e78-6c1ffd252dba" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_019b91b5-9ea0-7b3f-a165-5bfa4bd1e0b8" xlink:to="loc_us-gaap_ConcentrationRiskTable_019b91b5-7632-7bb3-8e78-6c1ffd252dba" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_019b91b5-cc2c-7f61-97e4-4fab75d687d6" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_019b91b5-7632-7bb3-8e78-6c1ffd252dba" xlink:to="loc_srt_MajorCustomersAxis_019b91b5-cc2c-7f61-97e4-4fab75d687d6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019b91b5-cc2c-7f61-97e4-4fab75d687d6_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_019b91b5-cc2c-7f61-97e4-4fab75d687d6" xlink:to="loc_srt_NameOfMajorCustomerDomain_019b91b5-cc2c-7f61-97e4-4fab75d687d6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019b91b5-cc2c-7c04-8859-466b0e267db7" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_019b91b5-cc2c-7f61-97e4-4fab75d687d6" xlink:to="loc_srt_NameOfMajorCustomerDomain_019b91b5-cc2c-7c04-8859-466b0e267db7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_CustomerAMember_019b91b5-cc2c-7e6a-850a-3dcc45438e34" xlink:href="patr-20251231.xsd#patr_CustomerAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019b91b5-cc2c-7c04-8859-466b0e267db7" xlink:to="loc_patr_CustomerAMember_019b91b5-cc2c-7e6a-850a-3dcc45438e34" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_CustomerBMember_019b91b5-cc2c-77ae-aaba-e03c42f4e8a3" xlink:href="patr-20251231.xsd#patr_CustomerBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019b91b5-cc2c-7c04-8859-466b0e267db7" xlink:to="loc_patr_CustomerBMember_019b91b5-cc2c-77ae-aaba-e03c42f4e8a3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_CustomerCMember_019b91b5-cc2c-7ee5-b87c-0d44825eeb85" xlink:href="patr-20251231.xsd#patr_CustomerCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019b91b5-cc2c-7c04-8859-466b0e267db7" xlink:to="loc_patr_CustomerCMember_019b91b5-cc2c-7ee5-b87c-0d44825eeb85" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_CustomerDMember_019b91b6-1e98-7802-ab6c-4fe9b114e41b" xlink:href="patr-20251231.xsd#patr_CustomerDMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019b91b5-cc2c-7c04-8859-466b0e267db7" xlink:to="loc_patr_CustomerDMember_019b91b6-1e98-7802-ab6c-4fe9b114e41b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_CustomerEMember_019c4c8e-5b99-7388-83fd-4287be2c9012" xlink:href="patr-20251231.xsd#patr_CustomerEMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019b91b5-cc2c-7c04-8859-466b0e267db7" xlink:to="loc_patr_CustomerEMember_019c4c8e-5b99-7388-83fd-4287be2c9012" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019b91b5-cc2c-722b-9957-ea1a3e354446" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_019b91b5-7632-7bb3-8e78-6c1ffd252dba" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019b91b5-cc2c-722b-9957-ea1a3e354446" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019b91b5-cc2c-722b-9957-ea1a3e354446_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019b91b5-cc2c-722b-9957-ea1a3e354446" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019b91b5-cc2c-722b-9957-ea1a3e354446_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019b91b5-cc2c-7605-b4e7-43481843a3a4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019b91b5-cc2c-722b-9957-ea1a3e354446" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019b91b5-cc2c-7605-b4e7-43481843a3a4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerMember_019b91b5-cc2c-7359-b827-a67bd533bb7b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019b91b5-cc2c-7605-b4e7-43481843a3a4" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerMember_019b91b5-cc2c-7359-b827-a67bd533bb7b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableMember_019b91b6-1e98-784c-b031-a852b5adf630" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019b91b5-cc2c-7605-b4e7-43481843a3a4" xlink:to="loc_us-gaap_AccountsReceivableMember_019b91b6-1e98-784c-b031-a852b5adf630" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_019b91b5-cc2c-7820-81dc-d5903da7ebd6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_019b91b5-7632-7bb3-8e78-6c1ffd252dba" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_019b91b5-cc2c-7820-81dc-d5903da7ebd6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019b91b5-cc2c-7820-81dc-d5903da7ebd6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019b91b5-cc2c-7820-81dc-d5903da7ebd6" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019b91b5-cc2c-7820-81dc-d5903da7ebd6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019b91b5-cc2c-74cf-ad07-95fbd0b0f9f9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019b91b5-cc2c-7820-81dc-d5903da7ebd6" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019b91b5-cc2c-74cf-ad07-95fbd0b0f9f9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember_019b91b5-cc2c-715f-ae14-2583d66b2442" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CustomerConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_019b91b5-cc2c-74cf-ad07-95fbd0b0f9f9" xlink:to="loc_us-gaap_CustomerConcentrationRiskMember_019b91b5-cc2c-715f-ae14-2583d66b2442" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_019b91b5-cc2c-71e6-b217-690fc27c1b30" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_019b91b5-9ea0-7b3f-a165-5bfa4bd1e0b8" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_019b91b5-cc2c-71e6-b217-690fc27c1b30" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.patriciaacquisitioncorp.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESScheduleofPotentiallyDilutiveItemsOutstandingDetails" xlink:type="simple" xlink:href="patr-20251231.xsd#SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESScheduleofPotentiallyDilutiveItemsOutstandingDetails"/>
  <link:definitionLink xlink:role="http://www.patriciaacquisitioncorp.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESScheduleofPotentiallyDilutiveItemsOutstandingDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_caf82413-15cb-4cce-99ec-1e4f62127fc3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_26667fc2-212b-429c-a593-a5d667ad127a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_caf82413-15cb-4cce-99ec-1e4f62127fc3" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_26667fc2-212b-429c-a593-a5d667ad127a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_3853483b-2c50-45ed-acdd-0a9547da03db" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_26667fc2-212b-429c-a593-a5d667ad127a" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_3853483b-2c50-45ed-acdd-0a9547da03db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_3853483b-2c50-45ed-acdd-0a9547da03db_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_3853483b-2c50-45ed-acdd-0a9547da03db" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_3853483b-2c50-45ed-acdd-0a9547da03db_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_597e7712-f9c7-4877-8044-90fa4b2951c5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_3853483b-2c50-45ed-acdd-0a9547da03db" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_597e7712-f9c7-4877-8044-90fa4b2951c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_CommonStockWarrantsMember_4ae6a200-8668-4ea9-9de0-dbf8c86da58b" xlink:href="patr-20251231.xsd#patr_CommonStockWarrantsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_597e7712-f9c7-4877-8044-90fa4b2951c5" xlink:to="loc_patr_CommonStockWarrantsMember_4ae6a200-8668-4ea9-9de0-dbf8c86da58b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_StockOptionsMember_a351746e-0157-445c-9986-5d4891833b94" xlink:href="patr-20251231.xsd#patr_StockOptionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_597e7712-f9c7-4877-8044-90fa4b2951c5" xlink:to="loc_patr_StockOptionsMember_a351746e-0157-445c-9986-5d4891833b94" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_5b7f20ab-0212-465f-8e60-2b1a206da7df" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_597e7712-f9c7-4877-8044-90fa4b2951c5" xlink:to="loc_us-gaap_RestrictedStockMember_5b7f20ab-0212-465f-8e60-2b1a206da7df" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_c25bc387-e709-49db-813e-226a9adc7760" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_597e7712-f9c7-4877-8044-90fa4b2951c5" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_c25bc387-e709-49db-813e-226a9adc7760" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_8da1e4d4-5db9-449c-8a1c-a176fbfc698a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_caf82413-15cb-4cce-99ec-1e4f62127fc3" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_8da1e4d4-5db9-449c-8a1c-a176fbfc698a" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.patriciaacquisitioncorp.com/role/REVENUEScheduleofDisaggregationofRevenueDetails" xlink:type="simple" xlink:href="patr-20251231.xsd#REVENUEScheduleofDisaggregationofRevenueDetails"/>
  <link:definitionLink xlink:role="http://www.patriciaacquisitioncorp.com/role/REVENUEScheduleofDisaggregationofRevenueDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_019cd16c-8382-70ac-a477-538eef449ae9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_019cd16b-dd6f-7ec9-9372-6c97986f1eb1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019cd16c-8382-70ac-a477-538eef449ae9" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019cd16b-dd6f-7ec9-9372-6c97986f1eb1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019bc789-63df-7011-9158-b0f31f846e0b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019cd16b-dd6f-7ec9-9372-6c97986f1eb1" xlink:to="loc_srt_ProductOrServiceAxis_019bc789-63df-7011-9158-b0f31f846e0b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019bc789-63df-7011-9158-b0f31f846e0b_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019bc789-63df-7011-9158-b0f31f846e0b" xlink:to="loc_srt_ProductsAndServicesDomain_019bc789-63df-7011-9158-b0f31f846e0b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019bc789-63df-7b5b-8e6a-700c747a6ec3" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019bc789-63df-7011-9158-b0f31f846e0b" xlink:to="loc_srt_ProductsAndServicesDomain_019bc789-63df-7b5b-8e6a-700c747a6ec3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_FleetServicesMember_019bc789-63df-7dbc-80a7-85247c150dd5" xlink:href="patr-20251231.xsd#patr_FleetServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019bc789-63df-7b5b-8e6a-700c747a6ec3" xlink:to="loc_patr_FleetServicesMember_019bc789-63df-7dbc-80a7-85247c150dd5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_SoftwareServicesMember_019bc789-63df-74de-a0bf-7eb1cb47ddd0" xlink:href="patr-20251231.xsd#patr_SoftwareServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019bc789-63df-7b5b-8e6a-700c747a6ec3" xlink:to="loc_patr_SoftwareServicesMember_019bc789-63df-74de-a0bf-7eb1cb47ddd0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019bc789-63df-7479-ba02-3a459a3ba480" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019cd16c-8382-70ac-a477-538eef449ae9" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019bc789-63df-7479-ba02-3a459a3ba480" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.patriciaacquisitioncorp.com/role/ACQUISITIONSNarrativeDetails" xlink:type="simple" xlink:href="patr-20251231.xsd#ACQUISITIONSNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.patriciaacquisitioncorp.com/role/ACQUISITIONSNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_019b076b-bf42-7663-84e1-33dd07c4588a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019b076b-bf42-7bda-bfb3-a6a8bf33f085" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019b076b-bf42-7663-84e1-33dd07c4588a" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019b076b-bf42-7bda-bfb3-a6a8bf33f085" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019b5a93-0e91-7c5b-b230-4bce3d125239" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019b076b-bf42-7bda-bfb3-a6a8bf33f085" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019b5a93-0e91-7c5b-b230-4bce3d125239" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b5a93-0e91-7c5b-b230-4bce3d125239_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019b5a93-0e91-7c5b-b230-4bce3d125239" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b5a93-0e91-7c5b-b230-4bce3d125239_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b5a93-0e91-79e4-9619-dfcdeccf5e26" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019b5a93-0e91-7c5b-b230-4bce3d125239" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b5a93-0e91-79e4-9619-dfcdeccf5e26" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_VoysysABMember_019b5a93-0e91-7987-87b2-dd46cb80d68e" xlink:href="patr-20251231.xsd#patr_VoysysABMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b5a93-0e91-79e4-9619-dfcdeccf5e26" xlink:to="loc_patr_VoysysABMember_019b5a93-0e91-7987-87b2-dd46cb80d68e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_VayuRoboticsInc.Member_019b5a93-fd75-7fbf-b431-7bf276df8e12" xlink:href="patr-20251231.xsd#patr_VayuRoboticsInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b5a93-0e91-79e4-9619-dfcdeccf5e26" xlink:to="loc_patr_VayuRoboticsInc.Member_019b5a93-fd75-7fbf-b431-7bf276df8e12" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019b5a94-64d4-7df1-8400-cbccd57967f5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019b076b-bf42-7bda-bfb3-a6a8bf33f085" xlink:to="loc_us-gaap_AwardTypeAxis_019b5a94-64d4-7df1-8400-cbccd57967f5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b5a94-64d4-7df1-8400-cbccd57967f5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019b5a94-64d4-7df1-8400-cbccd57967f5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b5a94-64d4-7df1-8400-cbccd57967f5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b5a94-64d4-7fc7-8230-a2d2636910e7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019b5a94-64d4-7df1-8400-cbccd57967f5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b5a94-64d4-7fc7-8230-a2d2636910e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_019b5a94-64d4-7400-a837-fcc7e6447441" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b5a94-64d4-7fc7-8230-a2d2636910e7" xlink:to="loc_us-gaap_PerformanceSharesMember_019b5a94-64d4-7400-a837-fcc7e6447441" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GranteeStatusAxis_019b5a94-64d4-7ab6-8043-14a4498b9916" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GranteeStatusAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019b076b-bf42-7bda-bfb3-a6a8bf33f085" xlink:to="loc_us-gaap_GranteeStatusAxis_019b5a94-64d4-7ab6-8043-14a4498b9916" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GranteeStatusDomain_019b5a94-64d4-7ab6-8043-14a4498b9916_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GranteeStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_GranteeStatusAxis_019b5a94-64d4-7ab6-8043-14a4498b9916" xlink:to="loc_us-gaap_GranteeStatusDomain_019b5a94-64d4-7ab6-8043-14a4498b9916_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GranteeStatusDomain_019b5a94-64d4-785c-80bc-47628a757b23" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GranteeStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_GranteeStatusAxis_019b5a94-64d4-7ab6-8043-14a4498b9916" xlink:to="loc_us-gaap_GranteeStatusDomain_019b5a94-64d4-785c-80bc-47628a757b23" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_ShareBasedPaymentArrangementCertainEmployeesOneMember_019b5a94-64d4-7d7e-8a6b-b41786f5619f" xlink:href="patr-20251231.xsd#patr_ShareBasedPaymentArrangementCertainEmployeesOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GranteeStatusDomain_019b5a94-64d4-785c-80bc-47628a757b23" xlink:to="loc_patr_ShareBasedPaymentArrangementCertainEmployeesOneMember_019b5a94-64d4-7d7e-8a6b-b41786f5619f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_ShareBasedPaymentArrangementCertainEmployeesTwoMember_019b5a94-9453-7112-a844-cf5c66d21e16" xlink:href="patr-20251231.xsd#patr_ShareBasedPaymentArrangementCertainEmployeesTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GranteeStatusDomain_019b5a94-64d4-785c-80bc-47628a757b23" xlink:to="loc_patr_ShareBasedPaymentArrangementCertainEmployeesTwoMember_019b5a94-9453-7112-a844-cf5c66d21e16" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019c4c50-b494-7b56-9d9f-86bbc19238a6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019b076b-bf42-7bda-bfb3-a6a8bf33f085" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019c4c50-b494-7b56-9d9f-86bbc19238a6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019c4c50-b494-7b56-9d9f-86bbc19238a6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019c4c50-b494-7b56-9d9f-86bbc19238a6" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019c4c50-b494-7b56-9d9f-86bbc19238a6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019c4c50-b494-70f7-aa10-2cdf9a8393b0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019c4c50-b494-7b56-9d9f-86bbc19238a6" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019c4c50-b494-70f7-aa10-2cdf9a8393b0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_019c4c50-d597-78d4-9a00-146a291e5faf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DevelopedTechnologyRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019c4c50-b494-70f7-aa10-2cdf9a8393b0" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_019c4c50-d597-78d4-9a00-146a291e5faf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementAxis_019cc4ea-0a89-7acd-9e24-8b76f94173be" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RestatementAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019b076b-bf42-7bda-bfb3-a6a8bf33f085" xlink:to="loc_srt_RestatementAxis_019cc4ea-0a89-7acd-9e24-8b76f94173be" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_019cc4ea-0a89-7acd-9e24-8b76f94173be_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RestatementAxis_019cc4ea-0a89-7acd-9e24-8b76f94173be" xlink:to="loc_srt_RestatementDomain_019cc4ea-0a89-7acd-9e24-8b76f94173be_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_019cc4ea-0a89-780c-a7d4-8f7e246210de" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RestatementAxis_019cc4ea-0a89-7acd-9e24-8b76f94173be" xlink:to="loc_srt_RestatementDomain_019cc4ea-0a89-780c-a7d4-8f7e246210de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RevisionOfPriorPeriodErrorCorrectionAdjustmentMember_019cc4ea-0a89-7ab6-b2d0-544676bf525d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RevisionOfPriorPeriodErrorCorrectionAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_019cc4ea-0a89-780c-a7d4-8f7e246210de" xlink:to="loc_srt_RevisionOfPriorPeriodErrorCorrectionAdjustmentMember_019cc4ea-0a89-7ab6-b2d0-544676bf525d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_019b5a93-0e91-7927-880e-f5cd8034a2cc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationConsiderationTransferred1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019b076b-bf42-7663-84e1-33dd07c4588a" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_019b5a93-0e91-7927-880e-f5cd8034a2cc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019b5a93-3d0c-7aa7-bb23-f9572ebc7fa0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019b076b-bf42-7663-84e1-33dd07c4588a" xlink:to="loc_us-gaap_Goodwill_019b5a93-3d0c-7aa7-bb23-f9572ebc7fa0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019b5a94-64d4-7b5d-bbd9-5160eb9a4c60" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019b076b-bf42-7663-84e1-33dd07c4588a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019b5a94-64d4-7b5d-bbd9-5160eb9a4c60" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_019b5a95-37d7-7db5-9250-ea095f3f2e9a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019b076b-bf42-7663-84e1-33dd07c4588a" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_019b5a95-37d7-7db5-9250-ea095f3f2e9a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_019c4c4f-c1fa-77a5-8f4b-21f7bfe66932" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019b076b-bf42-7663-84e1-33dd07c4588a" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_019c4c4f-c1fa-77a5-8f4b-21f7bfe66932" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_019c4c1a-c9b6-7c5b-ac46-c8b1c04774c5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019b076b-bf42-7663-84e1-33dd07c4588a" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_019c4c1a-c9b6-7c5b-ac46-c8b1c04774c5" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.patriciaacquisitioncorp.com/role/ACQUISITIONSPreliminaryAllocationofBusinessCombinationPurchasePriceandRecognizedAssetAcquiredandLiabilityAssumedDetails" xlink:type="simple" xlink:href="patr-20251231.xsd#ACQUISITIONSPreliminaryAllocationofBusinessCombinationPurchasePriceandRecognizedAssetAcquiredandLiabilityAssumedDetails"/>
  <link:definitionLink xlink:role="http://www.patriciaacquisitioncorp.com/role/ACQUISITIONSPreliminaryAllocationofBusinessCombinationPurchasePriceandRecognizedAssetAcquiredandLiabilityAssumedDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_019b5a98-d50b-7fdb-8396-09bb0ed08255" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019b5a98-d50b-7bc3-8312-b4bc69601954" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019b5a98-d50b-7fdb-8396-09bb0ed08255" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019b5a98-d50b-7bc3-8312-b4bc69601954" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019b5a98-d50b-7ac4-89dc-e7abe2cfa144" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019b5a98-d50b-7bc3-8312-b4bc69601954" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019b5a98-d50b-7ac4-89dc-e7abe2cfa144" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b5a98-d50b-7ac4-89dc-e7abe2cfa144_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019b5a98-d50b-7ac4-89dc-e7abe2cfa144" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b5a98-d50b-7ac4-89dc-e7abe2cfa144_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b5a98-d50b-79b1-aa36-0de2a482e487" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019b5a98-d50b-7ac4-89dc-e7abe2cfa144" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b5a98-d50b-79b1-aa36-0de2a482e487" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_VoysysABMember_019b5a98-d50b-716b-97c4-18929439169f" xlink:href="patr-20251231.xsd#patr_VoysysABMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b5a98-d50b-79b1-aa36-0de2a482e487" xlink:to="loc_patr_VoysysABMember_019b5a98-d50b-716b-97c4-18929439169f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_VayuRoboticsInc.Member_019b5a98-d50b-7452-969b-099bff2df708" xlink:href="patr-20251231.xsd#patr_VayuRoboticsInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b5a98-d50b-79b1-aa36-0de2a482e487" xlink:to="loc_patr_VayuRoboticsInc.Member_019b5a98-d50b-7452-969b-099bff2df708" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_019b5a98-d50b-7696-9425-bec1f97c9cda" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquireBusinessesGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019b5a98-d50b-7fdb-8396-09bb0ed08255" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_019b5a98-d50b-7696-9425-bec1f97c9cda" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_BusinessCombinationConsiderationTransferredEscrowAmount_019b5a98-d50b-7666-b714-9b55ce905a9f" xlink:href="patr-20251231.xsd#patr_BusinessCombinationConsiderationTransferredEscrowAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019b5a98-d50b-7fdb-8396-09bb0ed08255" xlink:to="loc_patr_BusinessCombinationConsiderationTransferredEscrowAmount_019b5a98-d50b-7666-b714-9b55ce905a9f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_019b5a98-d50b-7437-b344-c55328b6a8b3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationConsiderationTransferred1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019b5a98-d50b-7fdb-8396-09bb0ed08255" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_019b5a98-d50b-7437-b344-c55328b6a8b3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_019b5a98-d50b-75a7-96d6-f6d6b7621af5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019b5a98-d50b-7fdb-8396-09bb0ed08255" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_019b5a98-d50b-75a7-96d6-f6d6b7621af5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_019b5a98-d50b-7d93-a006-2e984e4da796" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_019b5a98-d50b-75a7-96d6-f6d6b7621af5" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_019b5a98-d50b-7d93-a006-2e984e4da796" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther_019b5a98-d50b-78c7-bc47-3bf0d07d962c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_019b5a98-d50b-75a7-96d6-f6d6b7621af5" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther_019b5a98-d50b-78c7-bc47-3bf0d07d962c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_019b5a98-d50b-799e-9ff2-840378bd2259" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_019b5a98-d50b-75a7-96d6-f6d6b7621af5" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_019b5a98-d50b-799e-9ff2-840378bd2259" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_019b5a98-d50b-7a9d-99ba-8a230072a62c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_019b5a98-d50b-75a7-96d6-f6d6b7621af5" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_019b5a98-d50b-7a9d-99ba-8a230072a62c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_019b5a98-d50b-7a1b-ad39-ba29202c631a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_019b5a98-d50b-75a7-96d6-f6d6b7621af5" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_019b5a98-d50b-7a1b-ad39-ba29202c631a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_019b5a98-d50b-791f-beb8-047083a202ee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019b5a98-d50b-7fdb-8396-09bb0ed08255" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_019b5a98-d50b-791f-beb8-047083a202ee" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities_019b5a98-d50b-7368-bea5-ec6337b67b14" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_019b5a98-d50b-791f-beb8-047083a202ee" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities_019b5a98-d50b-7368-bea5-ec6337b67b14" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_019b5a98-d50b-7aad-9ea0-5f6a4dea3474" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_019b5a98-d50b-791f-beb8-047083a202ee" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_019b5a98-d50b-7aad-9ea0-5f6a4dea3474" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther_019b5a98-d50b-76a8-9358-5616440d4334" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_019b5a98-d50b-791f-beb8-047083a202ee" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther_019b5a98-d50b-76a8-9358-5616440d4334" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities_019c4c53-1a41-71e3-b963-9bfa3cf03fbe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_019b5a98-d50b-791f-beb8-047083a202ee" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities_019c4c53-1a41-71e3-b963-9bfa3cf03fbe" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_019b5a98-d50b-7cdf-824f-a71de39eff73" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_019b5a98-d50b-791f-beb8-047083a202ee" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_019b5a98-d50b-7cdf-824f-a71de39eff73" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_019b5a98-d50b-7ed9-b20f-8dcf43a79bbb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019b5a98-d50b-7fdb-8396-09bb0ed08255" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_019b5a98-d50b-7ed9-b20f-8dcf43a79bbb" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019b5a98-d50b-792a-bd05-d81393195fc6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019b5a98-d50b-7fdb-8396-09bb0ed08255" xlink:to="loc_us-gaap_Goodwill_019b5a98-d50b-792a-bd05-d81393195fc6" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.patriciaacquisitioncorp.com/role/ACQUISITIONSScheduleofPreliminaryFairValuesoftheIdentifiedIntangibleAssetsAcquiredDetails" xlink:type="simple" xlink:href="patr-20251231.xsd#ACQUISITIONSScheduleofPreliminaryFairValuesoftheIdentifiedIntangibleAssetsAcquiredDetails"/>
  <link:definitionLink xlink:role="http://www.patriciaacquisitioncorp.com/role/ACQUISITIONSScheduleofPreliminaryFairValuesoftheIdentifiedIntangibleAssetsAcquiredDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_019b076b-bf42-706f-b5e1-ce48eafde39b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019b076b-bf42-781b-a6f3-395248a974a2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019b076b-bf42-706f-b5e1-ce48eafde39b" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019b076b-bf42-781b-a6f3-395248a974a2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019b076b-bf42-7f38-b205-357779874c9e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019b076b-bf42-781b-a6f3-395248a974a2" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019b076b-bf42-7f38-b205-357779874c9e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b076b-bf42-7f38-b205-357779874c9e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019b076b-bf42-7f38-b205-357779874c9e" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b076b-bf42-7f38-b205-357779874c9e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b076b-bf42-7663-b2f6-111c1ec335f5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019b076b-bf42-7f38-b205-357779874c9e" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b076b-bf42-7663-b2f6-111c1ec335f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_VoysysABMember_019b076b-bf42-7128-aa31-02caf46953fd" xlink:href="patr-20251231.xsd#patr_VoysysABMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b076b-bf42-7663-b2f6-111c1ec335f5" xlink:to="loc_patr_VoysysABMember_019b076b-bf42-7128-aa31-02caf46953fd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_VayuRoboticsInc.Member_019b076b-bf42-71e2-909e-d1deb073681d" xlink:href="patr-20251231.xsd#patr_VayuRoboticsInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b076b-bf42-7663-b2f6-111c1ec335f5" xlink:to="loc_patr_VayuRoboticsInc.Member_019b076b-bf42-71e2-909e-d1deb073681d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019b076b-bf42-7805-a39e-ce52c1124baf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019b076b-bf42-781b-a6f3-395248a974a2" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019b076b-bf42-7805-a39e-ce52c1124baf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b076b-bf42-7805-a39e-ce52c1124baf_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019b076b-bf42-7805-a39e-ce52c1124baf" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b076b-bf42-7805-a39e-ce52c1124baf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b076b-bf42-77c8-bd73-e67da95af7be" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019b076b-bf42-7805-a39e-ce52c1124baf" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b076b-bf42-77c8-bd73-e67da95af7be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_019b076b-bf42-7090-9cff-9340d2ce655b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DevelopedTechnologyRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b076b-bf42-77c8-bd73-e67da95af7be" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_019b076b-bf42-7090-9cff-9340d2ce655b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_019b076b-bf42-77f0-8958-56f12569aa5e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b076b-bf42-77c8-bd73-e67da95af7be" xlink:to="loc_us-gaap_CustomerRelationshipsMember_019b076b-bf42-77f0-8958-56f12569aa5e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_019b076b-bf42-74be-af5f-a63cc3bcd905" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b076b-bf42-77c8-bd73-e67da95af7be" xlink:to="loc_us-gaap_TradeNamesMember_019b076b-bf42-74be-af5f-a63cc3bcd905" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_019cd613-db27-765c-a77f-277191ec278d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019b076b-bf42-706f-b5e1-ce48eafde39b" xlink:to="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_019cd613-db27-765c-a77f-277191ec278d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_019b076b-bf42-7e48-a30f-81bc5aa7cba7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019b076b-bf42-706f-b5e1-ce48eafde39b" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_019b076b-bf42-7e48-a30f-81bc5aa7cba7" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.patriciaacquisitioncorp.com/role/ACQUISITIONSScheduleofTotalFairValueofConsiderationPaidinConnectionwiththeAcquisitionDetails" xlink:type="simple" xlink:href="patr-20251231.xsd#ACQUISITIONSScheduleofTotalFairValueofConsiderationPaidinConnectionwiththeAcquisitionDetails"/>
  <link:definitionLink xlink:role="http://www.patriciaacquisitioncorp.com/role/ACQUISITIONSScheduleofTotalFairValueofConsiderationPaidinConnectionwiththeAcquisitionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_019b076b-bf42-785e-82e2-e4b434c83cf4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019b076b-bf42-7499-a10a-2b4446076e4b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019b076b-bf42-785e-82e2-e4b434c83cf4" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019b076b-bf42-7499-a10a-2b4446076e4b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019b076b-bf42-7f5b-b089-d6e48b8bf500" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019b076b-bf42-7499-a10a-2b4446076e4b" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019b076b-bf42-7f5b-b089-d6e48b8bf500" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b076b-bf42-7f5b-b089-d6e48b8bf500_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019b076b-bf42-7f5b-b089-d6e48b8bf500" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b076b-bf42-7f5b-b089-d6e48b8bf500_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b076b-bf42-704b-9076-cd00614c0533" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019b076b-bf42-7f5b-b089-d6e48b8bf500" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b076b-bf42-704b-9076-cd00614c0533" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_VayuRoboticsInc.Member_019b076b-bf42-73b6-8251-262a8581bf6b" xlink:href="patr-20251231.xsd#patr_VayuRoboticsInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b076b-bf42-704b-9076-cd00614c0533" xlink:to="loc_patr_VayuRoboticsInc.Member_019b076b-bf42-73b6-8251-262a8581bf6b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_019b076b-bf42-77f7-8ebe-bd35051f8c0e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityInterestIssuedOrIssuableByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019b076b-bf42-7499-a10a-2b4446076e4b" xlink:to="loc_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_019b076b-bf42-77f7-8ebe-bd35051f8c0e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_019b076b-bf42-77f7-8ebe-bd35051f8c0e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityInterestIssuedOrIssuableTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_019b076b-bf42-77f7-8ebe-bd35051f8c0e" xlink:to="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_019b076b-bf42-77f7-8ebe-bd35051f8c0e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_019b076b-bf42-75e2-ac31-bd3edb611cdc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityInterestIssuedOrIssuableTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_019b076b-bf42-77f7-8ebe-bd35051f8c0e" xlink:to="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_019b076b-bf42-75e2-ac31-bd3edb611cdc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019b076b-bf42-748c-a884-bc052b67ef2d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_019b076b-bf42-75e2-ac31-bd3edb611cdc" xlink:to="loc_us-gaap_CommonStockMember_019b076b-bf42-748c-a884-bc052b67ef2d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantMember_019b076b-bf42-7123-aadc-41b562ef4752" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_019b076b-bf42-75e2-ac31-bd3edb611cdc" xlink:to="loc_us-gaap_WarrantMember_019b076b-bf42-7123-aadc-41b562ef4752" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockCompensationPlanMember_019b076b-bf42-79a9-b308-6a3f8e07e99b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockCompensationPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_019b076b-bf42-75e2-ac31-bd3edb611cdc" xlink:to="loc_us-gaap_StockCompensationPlanMember_019b076b-bf42-79a9-b308-6a3f8e07e99b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_019b076b-bf42-716c-a1a8-cf35aa7a018a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019b076b-bf42-785e-82e2-e4b434c83cf4" xlink:to="loc_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_019b076b-bf42-716c-a1a8-cf35aa7a018a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionSharePrice_019b076b-bf42-769d-874f-97596e58df10" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionSharePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019b076b-bf42-785e-82e2-e4b434c83cf4" xlink:to="loc_us-gaap_BusinessAcquisitionSharePrice_019b076b-bf42-769d-874f-97596e58df10" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_019b076b-bf42-7afc-a583-ae2b97d704d4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquireBusinessesGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019b076b-bf42-785e-82e2-e4b434c83cf4" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_019b076b-bf42-7afc-a583-ae2b97d704d4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_BusinessCombinationConsiderationTransferredNetWorkingCapitalAdjustment_019cdbde-1215-75e6-ae91-760a80675aa1" xlink:href="patr-20251231.xsd#patr_BusinessCombinationConsiderationTransferredNetWorkingCapitalAdjustment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019b076b-bf42-785e-82e2-e4b434c83cf4" xlink:to="loc_patr_BusinessCombinationConsiderationTransferredNetWorkingCapitalAdjustment_019cdbde-1215-75e6-ae91-760a80675aa1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_019b076b-bf42-7e47-9f7a-f02637832f57" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019b076b-bf42-785e-82e2-e4b434c83cf4" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_019b076b-bf42-7e47-9f7a-f02637832f57" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_019b076b-bf42-7454-a0bd-0476e0ab8124" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationConsiderationTransferred1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019b076b-bf42-785e-82e2-e4b434c83cf4" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_019b076b-bf42-7454-a0bd-0476e0ab8124" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.patriciaacquisitioncorp.com/role/GOODWILLANDINTANGIBLEASSETSNETScheduleofIntangibleAssetsNetDetails" xlink:type="simple" xlink:href="patr-20251231.xsd#GOODWILLANDINTANGIBLEASSETSNETScheduleofIntangibleAssetsNetDetails"/>
  <link:definitionLink xlink:role="http://www.patriciaacquisitioncorp.com/role/GOODWILLANDINTANGIBLEASSETSNETScheduleofIntangibleAssetsNetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019b076b-e6e6-7ca1-9c45-085229a62020" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019b076b-e6e6-7893-ab23-fd0d08a63ae4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019b076b-e6e6-7ca1-9c45-085229a62020" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019b076b-e6e6-7893-ab23-fd0d08a63ae4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019b076b-e6e6-75e0-86fb-cda573334e32" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019b076b-e6e6-7893-ab23-fd0d08a63ae4" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019b076b-e6e6-75e0-86fb-cda573334e32" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b076b-e6e6-75e0-86fb-cda573334e32_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019b076b-e6e6-75e0-86fb-cda573334e32" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b076b-e6e6-75e0-86fb-cda573334e32_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b076b-e6e6-7475-9773-786e8a92e618" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019b076b-e6e6-75e0-86fb-cda573334e32" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b076b-e6e6-7475-9773-786e8a92e618" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_019b076b-e6e6-7079-a2eb-61f317fca891" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DevelopedTechnologyRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b076b-e6e6-7475-9773-786e8a92e618" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_019b076b-e6e6-7079-a2eb-61f317fca891" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_019b076b-e6e6-752b-9a60-270f49169623" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b076b-e6e6-7475-9773-786e8a92e618" xlink:to="loc_us-gaap_CustomerRelationshipsMember_019b076b-e6e6-752b-9a60-270f49169623" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_019b076b-e6e6-75b4-af6d-505808227fb9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b076b-e6e6-7475-9773-786e8a92e618" xlink:to="loc_us-gaap_TradeNamesMember_019b076b-e6e6-75b4-af6d-505808227fb9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_019b076b-e6e6-7c7e-85c7-a7291916de41" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019b076b-e6e6-7ca1-9c45-085229a62020" xlink:to="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_019b076b-e6e6-7c7e-85c7-a7291916de41" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019b076b-e6e6-7178-b97e-6af434468701" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019b076b-e6e6-7ca1-9c45-085229a62020" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019b076b-e6e6-7178-b97e-6af434468701" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019b076b-e6e6-71c5-acad-c79f1fcd89d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019b076b-e6e6-7ca1-9c45-085229a62020" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019b076b-e6e6-71c5-acad-c79f1fcd89d0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019b076b-e6e6-761f-8db8-c038e7a332ac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019b076b-e6e6-7ca1-9c45-085229a62020" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019b076b-e6e6-761f-8db8-c038e7a332ac" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.patriciaacquisitioncorp.com/role/GOODWILLANDINTANGIBLEASSETSNETNarrativeDetails" xlink:type="simple" xlink:href="patr-20251231.xsd#GOODWILLANDINTANGIBLEASSETSNETNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.patriciaacquisitioncorp.com/role/GOODWILLANDINTANGIBLEASSETSNETNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019b076b-e6e6-7988-b6ae-5b9e545654e4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019b076b-e6e6-7559-a5a9-523e9133c80c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019b076b-e6e6-7988-b6ae-5b9e545654e4" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019b076b-e6e6-7559-a5a9-523e9133c80c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019b076b-e6e6-71ba-bc83-b3b0d842bff7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019b076b-e6e6-7559-a5a9-523e9133c80c" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019b076b-e6e6-71ba-bc83-b3b0d842bff7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b076b-e6e6-71ba-bc83-b3b0d842bff7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019b076b-e6e6-71ba-bc83-b3b0d842bff7" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b076b-e6e6-71ba-bc83-b3b0d842bff7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b076b-e6e6-7314-ba96-1392894546d5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019b076b-e6e6-71ba-bc83-b3b0d842bff7" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b076b-e6e6-7314-ba96-1392894546d5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_019b076b-e6e6-7487-99a9-e0225b3733be" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DevelopedTechnologyRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b076b-e6e6-7314-ba96-1392894546d5" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_019b076b-e6e6-7487-99a9-e0225b3733be" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_019b076b-e6e6-7903-87e9-7f940fc1586d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b076b-e6e6-7314-ba96-1392894546d5" xlink:to="loc_us-gaap_CustomerRelationshipsMember_019b076b-e6e6-7903-87e9-7f940fc1586d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_019b076b-e6e6-7f64-bc6f-14711df3a107" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b076b-e6e6-7314-ba96-1392894546d5" xlink:to="loc_us-gaap_TradeNamesMember_019b076b-e6e6-7f64-bc6f-14711df3a107" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019bc78d-deac-753a-9750-754b6d4f601e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019b076b-e6e6-7559-a5a9-523e9133c80c" xlink:to="loc_srt_RangeAxis_019bc78d-deac-753a-9750-754b6d4f601e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019bc78d-deac-753a-9750-754b6d4f601e_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019bc78d-deac-753a-9750-754b6d4f601e" xlink:to="loc_srt_RangeMember_019bc78d-deac-753a-9750-754b6d4f601e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019bc78d-deac-7c7d-a053-4bf51b4e4a3f" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019bc78d-deac-753a-9750-754b6d4f601e" xlink:to="loc_srt_RangeMember_019bc78d-deac-7c7d-a053-4bf51b4e4a3f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019bc78e-5990-73ef-8e63-3965f9e45e1c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019bc78d-deac-7c7d-a053-4bf51b4e4a3f" xlink:to="loc_srt_MinimumMember_019bc78e-5990-73ef-8e63-3965f9e45e1c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019bc78e-0166-77d2-b3d2-ee0dfccebf3b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019bc78d-deac-7c7d-a053-4bf51b4e4a3f" xlink:to="loc_srt_MaximumMember_019bc78e-0166-77d2-b3d2-ee0dfccebf3b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1_019b076b-e6e6-72ce-afee-c82e8e59671d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019b076b-e6e6-7988-b6ae-5b9e545654e4" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1_019b076b-e6e6-72ce-afee-c82e8e59671d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_019b076b-e6e6-7d59-baeb-36e71535d3eb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019b076b-e6e6-7988-b6ae-5b9e545654e4" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_019b076b-e6e6-7d59-baeb-36e71535d3eb" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.patriciaacquisitioncorp.com/role/FAIRVALUEMEASUREMENTSScheduleofAssetsMeasuredatFairValueonaRecurringBasisDetails" xlink:type="simple" xlink:href="patr-20251231.xsd#FAIRVALUEMEASUREMENTSScheduleofAssetsMeasuredatFairValueonaRecurringBasisDetails"/>
  <link:definitionLink xlink:role="http://www.patriciaacquisitioncorp.com/role/FAIRVALUEMEASUREMENTSScheduleofAssetsMeasuredatFairValueonaRecurringBasisDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019b68bc-3820-7919-a79b-7734d6e2e7c7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019b68bc-3820-76d2-887c-d0a5f2b7bc24" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019b68bc-3820-7919-a79b-7734d6e2e7c7" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019b68bc-3820-76d2-887c-d0a5f2b7bc24" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019b68bc-3820-7563-b832-f5d3ca6364c3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019b68bc-3820-76d2-887c-d0a5f2b7bc24" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019b68bc-3820-7563-b832-f5d3ca6364c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019b68bc-3820-7563-b832-f5d3ca6364c3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019b68bc-3820-7563-b832-f5d3ca6364c3" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019b68bc-3820-7563-b832-f5d3ca6364c3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019b68bc-3820-766c-9c55-0b6046240ce7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019b68bc-3820-7563-b832-f5d3ca6364c3" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019b68bc-3820-766c-9c55-0b6046240ce7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_019b68bc-3820-7aaa-8749-016517255ce3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019b68bc-3820-766c-9c55-0b6046240ce7" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_019b68bc-3820-7aaa-8749-016517255ce3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019b68bc-3820-735d-8369-6e412e6f1670" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019b68bc-3820-766c-9c55-0b6046240ce7" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019b68bc-3820-735d-8369-6e412e6f1670" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019b68bc-3820-7a0b-9620-587e0dfcba62" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019b68bc-3820-766c-9c55-0b6046240ce7" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019b68bc-3820-7a0b-9620-587e0dfcba62" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAxis_019b68bc-3820-71b8-9f3d-e8d25b68d066" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019b68bc-3820-76d2-887c-d0a5f2b7bc24" xlink:to="loc_us-gaap_CashAndCashEquivalentsAxis_019b68bc-3820-71b8-9f3d-e8d25b68d066" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019b68bc-3820-71b8-9f3d-e8d25b68d066_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_019b68bc-3820-71b8-9f3d-e8d25b68d066" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019b68bc-3820-71b8-9f3d-e8d25b68d066_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019b68bc-3820-7daf-83e7-e32d3657a641" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_019b68bc-3820-71b8-9f3d-e8d25b68d066" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019b68bc-3820-7daf-83e7-e32d3657a641" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MoneyMarketFundsMember_019b68bc-3820-7a4e-862a-528ccc10afb8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MoneyMarketFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019b68bc-3820-7daf-83e7-e32d3657a641" xlink:to="loc_us-gaap_MoneyMarketFundsMember_019b68bc-3820-7a4e-862a-528ccc10afb8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_019bdb18-0272-756d-a7ea-1dec6aa6f4ba" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialPaperMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019b68bc-3820-7daf-83e7-e32d3657a641" xlink:to="loc_us-gaap_CommercialPaperMember_019bdb18-0272-756d-a7ea-1dec6aa6f4ba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019b68bc-3820-7ffb-b9a2-a565f90aea43" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019b68bc-3820-76d2-887c-d0a5f2b7bc24" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019b68bc-3820-7ffb-b9a2-a565f90aea43" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b68bc-3820-7ffb-b9a2-a565f90aea43_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019b68bc-3820-7ffb-b9a2-a565f90aea43" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b68bc-3820-7ffb-b9a2-a565f90aea43_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b68bc-3820-746b-90c2-50589e9180c8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019b68bc-3820-7ffb-b9a2-a565f90aea43" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b68bc-3820-746b-90c2-50589e9180c8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CertificatesOfDepositMember_019b68bc-3820-7ff1-a108-18c9339f4470" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CertificatesOfDepositMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b68bc-3820-746b-90c2-50589e9180c8" xlink:to="loc_us-gaap_CertificatesOfDepositMember_019b68bc-3820-7ff1-a108-18c9339f4470" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperNotIncludedWithCashAndCashEquivalentsMember_019b68bc-3820-7a70-83bf-8e7e7dfe2b25" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialPaperNotIncludedWithCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b68bc-3820-746b-90c2-50589e9180c8" xlink:to="loc_us-gaap_CommercialPaperNotIncludedWithCashAndCashEquivalentsMember_019b68bc-3820-7a70-83bf-8e7e7dfe2b25" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_019b68bc-3820-7ac3-8e43-7372f78f9d29" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b68bc-3820-746b-90c2-50589e9180c8" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_019b68bc-3820-7ac3-8e43-7372f78f9d29" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_019bdb12-abf7-77a1-9eb3-519d011db11b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_USGovernmentAgenciesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b68bc-3820-746b-90c2-50589e9180c8" xlink:to="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_019bdb12-abf7-77a1-9eb3-519d011db11b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_019b68bc-3820-733f-84db-9508edf3b42d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_USTreasurySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b68bc-3820-746b-90c2-50589e9180c8" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_019b68bc-3820-733f-84db-9508edf3b42d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019b68bc-3820-7857-87ba-3e4f1dc43d68" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019b68bc-3820-7919-a79b-7734d6e2e7c7" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019b68bc-3820-7857-87ba-3e4f1dc43d68" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_019b68bc-3820-7556-88ec-4c2f8e4b1240" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019b68bc-3820-7919-a79b-7734d6e2e7c7" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_019b68bc-3820-7556-88ec-4c2f8e4b1240" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesNoncurrent_019c2934-37e7-7823-82f4-f80b5d78d98e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecuritiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019b68bc-3820-7919-a79b-7734d6e2e7c7" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesNoncurrent_019c2934-37e7-7823-82f4-f80b5d78d98e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_019b68bc-3820-750d-828b-a8d23f7fa99d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019b68bc-3820-7919-a79b-7734d6e2e7c7" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_019b68bc-3820-750d-828b-a8d23f7fa99d" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.patriciaacquisitioncorp.com/role/FAIRVALUEMEASUREMENTSNarrativeDetails" xlink:type="simple" xlink:href="patr-20251231.xsd#FAIRVALUEMEASUREMENTSNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.patriciaacquisitioncorp.com/role/FAIRVALUEMEASUREMENTSNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_6f0dd262-0674-4c3b-bf42-e07f637e94a2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativesFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_49d49d7e-5e51-4dd1-8e26-d688a84271b1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_6f0dd262-0674-4c3b-bf42-e07f637e94a2" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_49d49d7e-5e51-4dd1-8e26-d688a84271b1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_9bb3ae88-f2b4-4046-9489-dca9bb9292fb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_49d49d7e-5e51-4dd1-8e26-d688a84271b1" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_9bb3ae88-f2b4-4046-9489-dca9bb9292fb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_9bb3ae88-f2b4-4046-9489-dca9bb9292fb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_9bb3ae88-f2b4-4046-9489-dca9bb9292fb" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_9bb3ae88-f2b4-4046-9489-dca9bb9292fb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_705dafda-c75f-45d0-b22f-2dfc2ac8ebd9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_9bb3ae88-f2b4-4046-9489-dca9bb9292fb" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_705dafda-c75f-45d0-b22f-2dfc2ac8ebd9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_MeasurementInputProbabilityRateMember_f672cff5-d135-4fe9-bf71-24c2b310fa6b" xlink:href="patr-20251231.xsd#patr_MeasurementInputProbabilityRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_705dafda-c75f-45d0-b22f-2dfc2ac8ebd9" xlink:to="loc_patr_MeasurementInputProbabilityRateMember_f672cff5-d135-4fe9-bf71-24c2b310fa6b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeAxis_019b5b06-e8c9-7609-89e7-eba0a872e096" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_49d49d7e-5e51-4dd1-8e26-d688a84271b1" xlink:to="loc_us-gaap_ShortTermDebtTypeAxis_019b5b06-e8c9-7609-89e7-eba0a872e096" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_019b5b06-e8c9-7609-89e7-eba0a872e096_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_019b5b06-e8c9-7609-89e7-eba0a872e096" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_019b5b06-e8c9-7609-89e7-eba0a872e096_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_019b5b06-e8c9-7593-87a4-f8a28f504add" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_019b5b06-e8c9-7609-89e7-eba0a872e096" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_019b5b06-e8c9-7593-87a4-f8a28f504add" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleNotesPayableMember_019b5b06-e8c9-70f5-b3c3-86b715a17c03" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConvertibleNotesPayableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtTypeDomain_019b5b06-e8c9-7593-87a4-f8a28f504add" xlink:to="loc_us-gaap_ConvertibleNotesPayableMember_019b5b06-e8c9-70f5-b3c3-86b715a17c03" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityMeasurementInput_019b5b04-d43f-73ca-b8b1-bb4090ea6c30" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilityMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_6f0dd262-0674-4c3b-bf42-e07f637e94a2" xlink:to="loc_us-gaap_DerivativeLiabilityMeasurementInput_019b5b04-d43f-73ca-b8b1-bb4090ea6c30" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtConversionConvertedInstrumentSharesIssued1_019b5b06-e8c9-7082-96e6-c25371b9d805" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtConversionConvertedInstrumentSharesIssued1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_6f0dd262-0674-4c3b-bf42-e07f637e94a2" xlink:to="loc_us-gaap_DebtConversionConvertedInstrumentSharesIssued1_019b5b06-e8c9-7082-96e6-c25371b9d805" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.patriciaacquisitioncorp.com/role/MARKETABLESECURITIESScheduleofCashEquivalentsandMarketableSecuritiesDetails" xlink:type="simple" xlink:href="patr-20251231.xsd#MARKETABLESECURITIESScheduleofCashEquivalentsandMarketableSecuritiesDetails"/>
  <link:definitionLink xlink:role="http://www.patriciaacquisitioncorp.com/role/MARKETABLESECURITIESScheduleofCashEquivalentsandMarketableSecuritiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019b68d0-5c3b-77f9-820b-9a62633e2cb3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019b68d0-5c3b-7d41-bfe8-bb03ada01f88" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019b68d0-5c3b-77f9-820b-9a62633e2cb3" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019b68d0-5c3b-7d41-bfe8-bb03ada01f88" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019b68d0-5c3b-7c14-a0c5-92f3066dd76e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019b68d0-5c3b-7d41-bfe8-bb03ada01f88" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019b68d0-5c3b-7c14-a0c5-92f3066dd76e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b68d0-5c3b-7c14-a0c5-92f3066dd76e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019b68d0-5c3b-7c14-a0c5-92f3066dd76e" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b68d0-5c3b-7c14-a0c5-92f3066dd76e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b68d0-5c3b-7302-b2aa-b904154c2c2b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019b68d0-5c3b-7c14-a0c5-92f3066dd76e" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b68d0-5c3b-7302-b2aa-b904154c2c2b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MoneyMarketFundsMember_019b68d0-5c3b-726e-ab29-068f7814fc2b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MoneyMarketFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b68d0-5c3b-7302-b2aa-b904154c2c2b" xlink:to="loc_us-gaap_MoneyMarketFundsMember_019b68d0-5c3b-726e-ab29-068f7814fc2b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_019c293e-1d0f-7aec-9e64-ae52bb48dd14" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialPaperMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b68d0-5c3b-7302-b2aa-b904154c2c2b" xlink:to="loc_us-gaap_CommercialPaperMember_019c293e-1d0f-7aec-9e64-ae52bb48dd14" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CertificatesOfDepositMember_019b68d0-5c3b-717d-a4c2-badf9b62f692" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CertificatesOfDepositMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b68d0-5c3b-7302-b2aa-b904154c2c2b" xlink:to="loc_us-gaap_CertificatesOfDepositMember_019b68d0-5c3b-717d-a4c2-badf9b62f692" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_019b68d0-5c3b-7e46-8bf2-f09de2cd84f1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b68d0-5c3b-7302-b2aa-b904154c2c2b" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_019b68d0-5c3b-7e46-8bf2-f09de2cd84f1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_019c2944-89be-7138-a6fd-0acb3da70e49" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_USGovernmentAgenciesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b68d0-5c3b-7302-b2aa-b904154c2c2b" xlink:to="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_019c2944-89be-7138-a6fd-0acb3da70e49" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_019b68d0-5c3b-77be-a77e-b83c62c2f023" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_USTreasurySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b68d0-5c3b-7302-b2aa-b904154c2c2b" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_019b68d0-5c3b-77be-a77e-b83c62c2f023" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperNotIncludedWithCashAndCashEquivalentsMember_019b68d0-5c3b-7659-bd48-9c15fe2e077b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialPaperNotIncludedWithCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b68d0-5c3b-7302-b2aa-b904154c2c2b" xlink:to="loc_us-gaap_CommercialPaperNotIncludedWithCashAndCashEquivalentsMember_019b68d0-5c3b-7659-bd48-9c15fe2e077b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_CashEquivalentsFairValueToAmortizedCostAbstract_019b68d0-5c3b-717e-882e-ca3464d9fc18" xlink:href="patr-20251231.xsd#patr_CashEquivalentsFairValueToAmortizedCostAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019b68d0-5c3b-77f9-820b-9a62633e2cb3" xlink:to="loc_patr_CashEquivalentsFairValueToAmortizedCostAbstract_019b68d0-5c3b-717e-882e-ca3464d9fc18" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_CashAndCashEquivalentsAmortizedCost_019b68d0-5c3b-7d73-b63e-ba9d272b5dd8" xlink:href="patr-20251231.xsd#patr_CashAndCashEquivalentsAmortizedCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_patr_CashEquivalentsFairValueToAmortizedCostAbstract_019b68d0-5c3b-717e-882e-ca3464d9fc18" xlink:to="loc_patr_CashAndCashEquivalentsAmortizedCost_019b68d0-5c3b-7d73-b63e-ba9d272b5dd8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_CashAndCashEquivalentsAccumulatedGrossUnrealizedGainBeforeTax_019b68d0-5c3b-73a4-8564-e800811892dc" xlink:href="patr-20251231.xsd#patr_CashAndCashEquivalentsAccumulatedGrossUnrealizedGainBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_patr_CashEquivalentsFairValueToAmortizedCostAbstract_019b68d0-5c3b-717e-882e-ca3464d9fc18" xlink:to="loc_patr_CashAndCashEquivalentsAccumulatedGrossUnrealizedGainBeforeTax_019b68d0-5c3b-73a4-8564-e800811892dc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_CashAndCashEquivalentsAccumulatedGrossUnrealizedLossBeforeTax_019b68d0-5c3b-7bb5-8c54-79b609f7e5cb" xlink:href="patr-20251231.xsd#patr_CashAndCashEquivalentsAccumulatedGrossUnrealizedLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_patr_CashEquivalentsFairValueToAmortizedCostAbstract_019b68d0-5c3b-717e-882e-ca3464d9fc18" xlink:to="loc_patr_CashAndCashEquivalentsAccumulatedGrossUnrealizedLossBeforeTax_019b68d0-5c3b-7bb5-8c54-79b609f7e5cb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019b68d0-5c3b-78a8-9812-8815bc06bb0c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_patr_CashEquivalentsFairValueToAmortizedCostAbstract_019b68d0-5c3b-717e-882e-ca3464d9fc18" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019b68d0-5c3b-78a8-9812-8815bc06bb0c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_DebtSecuritiesAvailableForSaleCurrentFairValueToAmortizedCostAbstract_019b68d0-5c3b-74ec-bf21-e44c3471ffcf" xlink:href="patr-20251231.xsd#patr_DebtSecuritiesAvailableForSaleCurrentFairValueToAmortizedCostAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019b68d0-5c3b-77f9-820b-9a62633e2cb3" xlink:to="loc_patr_DebtSecuritiesAvailableForSaleCurrentFairValueToAmortizedCostAbstract_019b68d0-5c3b-74ec-bf21-e44c3471ffcf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostCurrent_019b68d0-5c3b-7b63-9ba2-87455fcf69f3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_patr_DebtSecuritiesAvailableForSaleCurrentFairValueToAmortizedCostAbstract_019b68d0-5c3b-74ec-bf21-e44c3471ffcf" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostCurrent_019b68d0-5c3b-7b63-9ba2-87455fcf69f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_DebtSecuritiesAvailableForSaleCurrentAccumulatedGrossUnrealizedGainBeforeTax_019b68d0-5c3b-7868-9ace-f33933bb67d8" xlink:href="patr-20251231.xsd#patr_DebtSecuritiesAvailableForSaleCurrentAccumulatedGrossUnrealizedGainBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_patr_DebtSecuritiesAvailableForSaleCurrentFairValueToAmortizedCostAbstract_019b68d0-5c3b-74ec-bf21-e44c3471ffcf" xlink:to="loc_patr_DebtSecuritiesAvailableForSaleCurrentAccumulatedGrossUnrealizedGainBeforeTax_019b68d0-5c3b-7868-9ace-f33933bb67d8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_DebtSecuritiesAvailableForSaleCurrentAccumulatedGrossUnrealizedLossBeforeTax_019b68d0-5c3b-7889-91dc-411169ff8d80" xlink:href="patr-20251231.xsd#patr_DebtSecuritiesAvailableForSaleCurrentAccumulatedGrossUnrealizedLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_patr_DebtSecuritiesAvailableForSaleCurrentFairValueToAmortizedCostAbstract_019b68d0-5c3b-74ec-bf21-e44c3471ffcf" xlink:to="loc_patr_DebtSecuritiesAvailableForSaleCurrentAccumulatedGrossUnrealizedLossBeforeTax_019b68d0-5c3b-7889-91dc-411169ff8d80" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_019b68d0-5c3b-7a09-a8d3-3b16e2a79f63" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_patr_DebtSecuritiesAvailableForSaleCurrentFairValueToAmortizedCostAbstract_019b68d0-5c3b-74ec-bf21-e44c3471ffcf" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_019b68d0-5c3b-7a09-a8d3-3b16e2a79f63" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_DebtSecuritiesAvailableForSaleNoncurrentFairValueToAmortizedCostAbstract_019c2946-85d9-7979-a803-5444c745a3de" xlink:href="patr-20251231.xsd#patr_DebtSecuritiesAvailableForSaleNoncurrentFairValueToAmortizedCostAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019b68d0-5c3b-77f9-820b-9a62633e2cb3" xlink:to="loc_patr_DebtSecuritiesAvailableForSaleNoncurrentFairValueToAmortizedCostAbstract_019c2946-85d9-7979-a803-5444c745a3de" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostNoncurrent_019c2946-eab5-728d-ad35-6bfe42073a51" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_patr_DebtSecuritiesAvailableForSaleNoncurrentFairValueToAmortizedCostAbstract_019c2946-85d9-7979-a803-5444c745a3de" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostNoncurrent_019c2946-eab5-728d-ad35-6bfe42073a51" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_DebtSecuritiesAvailableForSaleNoncurrentAccumulatedGrossUnrealizedGainBeforeTax_019c2947-5aa9-737a-a8f3-a6869c4f0453" xlink:href="patr-20251231.xsd#patr_DebtSecuritiesAvailableForSaleNoncurrentAccumulatedGrossUnrealizedGainBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_patr_DebtSecuritiesAvailableForSaleNoncurrentFairValueToAmortizedCostAbstract_019c2946-85d9-7979-a803-5444c745a3de" xlink:to="loc_patr_DebtSecuritiesAvailableForSaleNoncurrentAccumulatedGrossUnrealizedGainBeforeTax_019c2947-5aa9-737a-a8f3-a6869c4f0453" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_DebtSecuritiesAvailableForSaleNoncurrentAccumulatedGrossUnrealizedLossBeforeTax_019c2949-bd21-77a0-a9c9-d34d5a7019ed" xlink:href="patr-20251231.xsd#patr_DebtSecuritiesAvailableForSaleNoncurrentAccumulatedGrossUnrealizedLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_patr_DebtSecuritiesAvailableForSaleNoncurrentFairValueToAmortizedCostAbstract_019c2946-85d9-7979-a803-5444c745a3de" xlink:to="loc_patr_DebtSecuritiesAvailableForSaleNoncurrentAccumulatedGrossUnrealizedLossBeforeTax_019c2949-bd21-77a0-a9c9-d34d5a7019ed" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesNoncurrent_019c294a-4219-709a-9e4a-66ad18efb48f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecuritiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_patr_DebtSecuritiesAvailableForSaleNoncurrentFairValueToAmortizedCostAbstract_019c2946-85d9-7979-a803-5444c745a3de" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesNoncurrent_019c294a-4219-709a-9e4a-66ad18efb48f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_CashEquivalentsAndAvailableForSaleSecuritiesFairValueToAmortizedCostAbstract_019b68d0-5c3b-7c7b-b445-ce7deaf93007" xlink:href="patr-20251231.xsd#patr_CashEquivalentsAndAvailableForSaleSecuritiesFairValueToAmortizedCostAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019b68d0-5c3b-77f9-820b-9a62633e2cb3" xlink:to="loc_patr_CashEquivalentsAndAvailableForSaleSecuritiesFairValueToAmortizedCostAbstract_019b68d0-5c3b-7c7b-b445-ce7deaf93007" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_CashEquivalentsAndAvailableForSaleSecuritiesAmortizedCost_019b68d0-5c3b-72fa-8d56-fe30d44ea3dc" xlink:href="patr-20251231.xsd#patr_CashEquivalentsAndAvailableForSaleSecuritiesAmortizedCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_patr_CashEquivalentsAndAvailableForSaleSecuritiesFairValueToAmortizedCostAbstract_019b68d0-5c3b-7c7b-b445-ce7deaf93007" xlink:to="loc_patr_CashEquivalentsAndAvailableForSaleSecuritiesAmortizedCost_019b68d0-5c3b-72fa-8d56-fe30d44ea3dc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_CashEquivalentsAndAvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_019b68d0-5c3b-7fdd-b201-14522e094efe" xlink:href="patr-20251231.xsd#patr_CashEquivalentsAndAvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_patr_CashEquivalentsAndAvailableForSaleSecuritiesFairValueToAmortizedCostAbstract_019b68d0-5c3b-7c7b-b445-ce7deaf93007" xlink:to="loc_patr_CashEquivalentsAndAvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_019b68d0-5c3b-7fdd-b201-14522e094efe" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_CashEquivalentsAndAvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_019b68d0-5c3b-7ad8-a68e-e0016ed8fb32" xlink:href="patr-20251231.xsd#patr_CashEquivalentsAndAvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_patr_CashEquivalentsAndAvailableForSaleSecuritiesFairValueToAmortizedCostAbstract_019b68d0-5c3b-7c7b-b445-ce7deaf93007" xlink:to="loc_patr_CashEquivalentsAndAvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_019b68d0-5c3b-7ad8-a68e-e0016ed8fb32" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_CashEquivalentsAndAvailableForSaleSecuritiesFairValueDisclosure_019b68d0-5c3b-7972-ada9-442a329ee00b" xlink:href="patr-20251231.xsd#patr_CashEquivalentsAndAvailableForSaleSecuritiesFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_patr_CashEquivalentsAndAvailableForSaleSecuritiesFairValueToAmortizedCostAbstract_019b68d0-5c3b-7c7b-b445-ce7deaf93007" xlink:to="loc_patr_CashEquivalentsAndAvailableForSaleSecuritiesFairValueDisclosure_019b68d0-5c3b-7972-ada9-442a329ee00b" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.patriciaacquisitioncorp.com/role/PROPERTYANDEQUIPMENTNETScheduleofPropertyandEquipmentNetDetails" xlink:type="simple" xlink:href="patr-20251231.xsd#PROPERTYANDEQUIPMENTNETScheduleofPropertyandEquipmentNetDetails"/>
  <link:definitionLink xlink:role="http://www.patriciaacquisitioncorp.com/role/PROPERTYANDEQUIPMENTNETScheduleofPropertyandEquipmentNetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b68dc-4cec-7dee-86ee-74ffaca64639" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019b68dc-4cec-7744-8a02-cbd604d12caa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b68dc-4cec-7dee-86ee-74ffaca64639" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019b68dc-4cec-7744-8a02-cbd604d12caa" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019b68dc-4cec-7134-8311-0d85aeb84857" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019b68dc-4cec-7744-8a02-cbd604d12caa" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019b68dc-4cec-7134-8311-0d85aeb84857" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019b68dc-4cec-7134-8311-0d85aeb84857_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019b68dc-4cec-7134-8311-0d85aeb84857" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019b68dc-4cec-7134-8311-0d85aeb84857_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019b68dc-4cec-7995-a222-fb7853b88729" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019b68dc-4cec-7134-8311-0d85aeb84857" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019b68dc-4cec-7995-a222-fb7853b88729" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_RobotAssetsMember_019b68dc-4cec-7864-a672-a2174f93d09e" xlink:href="patr-20251231.xsd#patr_RobotAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019b68dc-4cec-7995-a222-fb7853b88729" xlink:to="loc_patr_RobotAssetsMember_019b68dc-4cec-7864-a672-a2174f93d09e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionInProgressMember_019b68dc-4cec-7570-ac1a-a3dfec6bd5e0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConstructionInProgressMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019b68dc-4cec-7995-a222-fb7853b88729" xlink:to="loc_us-gaap_ConstructionInProgressMember_019b68dc-4cec-7570-ac1a-a3dfec6bd5e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ToolsDiesAndMoldsMember_019b68dc-4cec-76d2-bc09-a3ab07026a3b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ToolsDiesAndMoldsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019b68dc-4cec-7995-a222-fb7853b88729" xlink:to="loc_us-gaap_ToolsDiesAndMoldsMember_019b68dc-4cec-76d2-bc09-a3ab07026a3b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_019b68dc-4cec-78ad-9e04-9261afa82267" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019b68dc-4cec-7995-a222-fb7853b88729" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_019b68dc-4cec-78ad-9e04-9261afa82267" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OfficeEquipmentMember_019b68dc-4cec-7421-8fff-3ba0f95be0d5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OfficeEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019b68dc-4cec-7995-a222-fb7853b88729" xlink:to="loc_us-gaap_OfficeEquipmentMember_019b68dc-4cec-7421-8fff-3ba0f95be0d5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_019b68dc-4cec-736c-82f7-72016bccc180" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b68dc-4cec-7dee-86ee-74ffaca64639" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_019b68dc-4cec-736c-82f7-72016bccc180" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_019b68dc-4cec-77ec-86a4-d8c5f609421a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b68dc-4cec-7dee-86ee-74ffaca64639" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_019b68dc-4cec-77ec-86a4-d8c5f609421a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_019b68dc-4cec-7859-8a65-1307f4d3bbae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b68dc-4cec-7dee-86ee-74ffaca64639" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_019b68dc-4cec-7859-8a65-1307f4d3bbae" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.patriciaacquisitioncorp.com/role/NOTESPAYABLEDetails" xlink:type="simple" xlink:href="patr-20251231.xsd#NOTESPAYABLEDetails"/>
  <link:definitionLink xlink:role="http://www.patriciaacquisitioncorp.com/role/NOTESPAYABLEDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtLineItems_7bd5ddc4-21b2-4a5c-a675-4421b7497333" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShortTermDebtTable_263bf504-89e0-4172-ab98-a075423e7a26" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShortTermDebtTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShortTermDebtLineItems_7bd5ddc4-21b2-4a5c-a675-4421b7497333" xlink:to="loc_us-gaap_ScheduleOfShortTermDebtTable_263bf504-89e0-4172-ab98-a075423e7a26" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019b68f1-ba52-7e9b-a17e-b575e93e90e0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_263bf504-89e0-4172-ab98-a075423e7a26" xlink:to="loc_us-gaap_DebtInstrumentAxis_019b68f1-ba52-7e9b-a17e-b575e93e90e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019b68f1-ba52-7e9b-a17e-b575e93e90e0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019b68f1-ba52-7e9b-a17e-b575e93e90e0" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019b68f1-ba52-7e9b-a17e-b575e93e90e0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019b68f1-ba52-7384-9248-b89216153150" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019b68f1-ba52-7e9b-a17e-b575e93e90e0" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019b68f1-ba52-7384-9248-b89216153150" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_SiliconValleyBankMember_019b68f1-ba52-74f0-ae68-da7ef478e23c" xlink:href="patr-20251231.xsd#patr_SiliconValleyBankMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b68f1-ba52-7384-9248-b89216153150" xlink:to="loc_patr_SiliconValleyBankMember_019b68f1-ba52-74f0-ae68-da7ef478e23c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019b68f1-ba52-71d3-b4a8-e57ece776186" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_263bf504-89e0-4172-ab98-a075423e7a26" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019b68f1-ba52-71d3-b4a8-e57ece776186" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019b68f1-ba52-71d3-b4a8-e57ece776186_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019b68f1-ba52-71d3-b4a8-e57ece776186" xlink:to="loc_us-gaap_RelatedPartyDomain_019b68f1-ba52-71d3-b4a8-e57ece776186_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019b68f1-ba52-7815-8017-5f52aa8c6992" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019b68f1-ba52-71d3-b4a8-e57ece776186" xlink:to="loc_us-gaap_RelatedPartyDomain_019b68f1-ba52-7815-8017-5f52aa8c6992" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ChiefExecutiveOfficerMember_019b68f1-ba52-7e56-aadd-a6d44780e2b9" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ChiefExecutiveOfficerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019b68f1-ba52-7815-8017-5f52aa8c6992" xlink:to="loc_srt_ChiefExecutiveOfficerMember_019b68f1-ba52-7e56-aadd-a6d44780e2b9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeAxis_019b68f1-e6b5-7d05-b591-1b04d312ebfb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_263bf504-89e0-4172-ab98-a075423e7a26" xlink:to="loc_us-gaap_ShortTermDebtTypeAxis_019b68f1-e6b5-7d05-b591-1b04d312ebfb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_019b68f1-e6b5-7d05-b591-1b04d312ebfb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_019b68f1-e6b5-7d05-b591-1b04d312ebfb" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_019b68f1-e6b5-7d05-b591-1b04d312ebfb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_019b68f1-e6b5-7b4e-b686-2b4aade25102" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_019b68f1-e6b5-7d05-b591-1b04d312ebfb" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_019b68f1-e6b5-7b4e-b686-2b4aade25102" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleNotesPayableMember_019b68f1-e6b5-72c8-abe8-76b58fcf35e5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConvertibleNotesPayableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtTypeDomain_019b68f1-e6b5-7b4e-b686-2b4aade25102" xlink:to="loc_us-gaap_ConvertibleNotesPayableMember_019b68f1-e6b5-72c8-abe8-76b58fcf35e5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightAxis_019b68f2-5d3f-70f1-9cad-4cd0f8e2bdb4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_263bf504-89e0-4172-ab98-a075423e7a26" xlink:to="loc_us-gaap_ClassOfWarrantOrRightAxis_019b68f2-5d3f-70f1-9cad-4cd0f8e2bdb4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_019b68f2-5d3f-70f1-9cad-4cd0f8e2bdb4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_019b68f2-5d3f-70f1-9cad-4cd0f8e2bdb4" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_019b68f2-5d3f-70f1-9cad-4cd0f8e2bdb4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_019b68f2-5d3f-7071-9b16-43242b2b70f1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_019b68f2-5d3f-70f1-9cad-4cd0f8e2bdb4" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_019b68f2-5d3f-7071-9b16-43242b2b70f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_ConvertiblePromissoryNotesOfferingWarrantsMember_019b68f2-5d3f-7b1a-ad6b-bf0302337e2f" xlink:href="patr-20251231.xsd#patr_ConvertiblePromissoryNotesOfferingWarrantsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_019b68f2-5d3f-7071-9b16-43242b2b70f1" xlink:to="loc_patr_ConvertiblePromissoryNotesOfferingWarrantsMember_019b68f2-5d3f-7b1a-ad6b-bf0302337e2f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfNotesPayable_019b68f1-ba52-7ea4-8e31-f99f90dac902" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepaymentsOfNotesPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_7bd5ddc4-21b2-4a5c-a675-4421b7497333" xlink:to="loc_us-gaap_RepaymentsOfNotesPayable_019b68f1-ba52-7ea4-8e31-f99f90dac902" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfDebtDiscountPremium_019b68f1-ba52-7ed5-bcee-f9b6eac581a4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfDebtDiscountPremium"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_7bd5ddc4-21b2-4a5c-a675-4421b7497333" xlink:to="loc_us-gaap_AmortizationOfDebtDiscountPremium_019b68f1-ba52-7ed5-bcee-f9b6eac581a4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromCommissionsReceived_019b68f1-ba52-7246-8c45-53542bacfd11" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromCommissionsReceived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_7bd5ddc4-21b2-4a5c-a675-4421b7497333" xlink:to="loc_us-gaap_ProceedsFromCommissionsReceived_019b68f1-ba52-7246-8c45-53542bacfd11" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019b68f1-ba52-7a83-8623-083dd6db4f22" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_7bd5ddc4-21b2-4a5c-a675-4421b7497333" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019b68f1-ba52-7a83-8623-083dd6db4f22" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfFinancingCosts_019b68f1-e6b5-7818-a4f6-66e5e25e0c6a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfFinancingCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_7bd5ddc4-21b2-4a5c-a675-4421b7497333" xlink:to="loc_us-gaap_PaymentsOfFinancingCosts_019b68f1-e6b5-7818-a4f6-66e5e25e0c6a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromDebtNetOfIssuanceCosts_019b68f1-e6b5-7bd3-9f59-7ebcf755a8f9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromDebtNetOfIssuanceCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_7bd5ddc4-21b2-4a5c-a675-4421b7497333" xlink:to="loc_us-gaap_ProceedsFromDebtNetOfIssuanceCosts_019b68f1-e6b5-7bd3-9f59-7ebcf755a8f9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts_019b68f1-e6b5-7aaa-b1f6-1bc4ae729ac8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfFinancingCostsAndDiscounts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_7bd5ddc4-21b2-4a5c-a675-4421b7497333" xlink:to="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts_019b68f1-e6b5-7aaa-b1f6-1bc4ae729ac8" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_DebtInstrumentInterestPaymentPeriod_019b68f1-e6b5-7c2a-b4c5-e0a7e0c02bc2" xlink:href="patr-20251231.xsd#patr_DebtInstrumentInterestPaymentPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_7bd5ddc4-21b2-4a5c-a675-4421b7497333" xlink:to="loc_patr_DebtInstrumentInterestPaymentPeriod_019b68f1-e6b5-7c2a-b4c5-e0a7e0c02bc2" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_PercentageOfCommonStockAtConversionPricePerPIPE_019b68f1-e6b5-70b7-8c95-7446b5362a2b" xlink:href="patr-20251231.xsd#patr_PercentageOfCommonStockAtConversionPricePerPIPE"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_7bd5ddc4-21b2-4a5c-a675-4421b7497333" xlink:to="loc_patr_PercentageOfCommonStockAtConversionPricePerPIPE_019b68f1-e6b5-70b7-8c95-7446b5362a2b" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_DebtConversionConvertedInstrumentQuotientAmount_019b68f1-e6b5-7601-afc6-aa67fd1b1b71" xlink:href="patr-20251231.xsd#patr_DebtConversionConvertedInstrumentQuotientAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_7bd5ddc4-21b2-4a5c-a675-4421b7497333" xlink:to="loc_patr_DebtConversionConvertedInstrumentQuotientAmount_019b68f1-e6b5-7601-afc6-aa67fd1b1b71" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtConversionConvertedInstrumentSharesIssued1_019b68f1-e6b5-735a-803d-4f998fd63468" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtConversionConvertedInstrumentSharesIssued1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_7bd5ddc4-21b2-4a5c-a675-4421b7497333" xlink:to="loc_us-gaap_DebtConversionConvertedInstrumentSharesIssued1_019b68f1-e6b5-735a-803d-4f998fd63468" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_019b68f1-e6b5-7a17-bdf0-562a8b94462d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentConvertibleConversionPrice1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_7bd5ddc4-21b2-4a5c-a675-4421b7497333" xlink:to="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_019b68f1-e6b5-7a17-bdf0-562a8b94462d" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_DerivativeLiabilityInConnectionWithConvertibleNote_019b68f1-e6b5-7b6c-bba6-d3a0c4c94b11" xlink:href="patr-20251231.xsd#patr_DerivativeLiabilityInConnectionWithConvertibleNote"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_7bd5ddc4-21b2-4a5c-a675-4421b7497333" xlink:to="loc_patr_DerivativeLiabilityInConnectionWithConvertibleNote_019b68f1-e6b5-7b6c-bba6-d3a0c4c94b11" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilities_019b68f2-5d3f-70fe-ad04-4d7661873b3c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_7bd5ddc4-21b2-4a5c-a675-4421b7497333" xlink:to="loc_us-gaap_DerivativeLiabilities_019b68f2-5d3f-70fe-ad04-4d7661873b3c" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityStatementOfFinancialPositionExtensibleEnumeration_019cd466-98eb-7db4-9def-c771c9e80d9e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilityStatementOfFinancialPositionExtensibleEnumeration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilities_019b68f2-5d3f-70fe-ad04-4d7661873b3c" xlink:to="loc_us-gaap_DerivativeLiabilityStatementOfFinancialPositionExtensibleEnumeration_019cd466-98eb-7db4-9def-c771c9e80d9e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseDebt_019b68f2-5d3f-7de2-b725-3e5b0b2e64e9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_7bd5ddc4-21b2-4a5c-a675-4421b7497333" xlink:to="loc_us-gaap_InterestExpenseDebt_019b68f2-5d3f-7de2-b725-3e5b0b2e64e9" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_ClassOfWarrantOrRightPercentageOfSecuritiesCalledByWarrantsOrRights_019b68f2-5d3f-771b-9328-5a35b88d8709" xlink:href="patr-20251231.xsd#patr_ClassOfWarrantOrRightPercentageOfSecuritiesCalledByWarrantsOrRights"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_7bd5ddc4-21b2-4a5c-a675-4421b7497333" xlink:to="loc_patr_ClassOfWarrantOrRightPercentageOfSecuritiesCalledByWarrantsOrRights_019b68f2-5d3f-771b-9328-5a35b88d8709" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_019b68f2-5d3f-71d3-974a-fc67fb7b8338" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_7bd5ddc4-21b2-4a5c-a675-4421b7497333" xlink:to="loc_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_019b68f2-5d3f-71d3-974a-fc67fb7b8338" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_019b68f2-5d3f-78ff-8e0b-42b5be40bb0a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_7bd5ddc4-21b2-4a5c-a675-4421b7497333" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_019b68f2-5d3f-78ff-8e0b-42b5be40bb0a" xlink:type="arc" order="17"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.patriciaacquisitioncorp.com/role/STOCKHOLDERSEQUITYDEFICITNarrativeDetails" xlink:type="simple" xlink:href="patr-20251231.xsd#STOCKHOLDERSEQUITYDEFICITNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.patriciaacquisitioncorp.com/role/STOCKHOLDERSEQUITYDEFICITNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightTable_c205afba-c290-44c2-85b4-d99722ffc9d2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_ClassOfWarrantOrRightTable_c205afba-c290-44c2-85b4-d99722ffc9d2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019c9ef6-fb85-7dd7-b878-05cdaa95b9f7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ClassOfWarrantOrRightTable_c205afba-c290-44c2-85b4-d99722ffc9d2" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019c9ef6-fb85-7dd7-b878-05cdaa95b9f7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019c9ef6-fb85-7dd7-b878-05cdaa95b9f7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019c9ef6-fb85-7dd7-b878-05cdaa95b9f7" xlink:to="loc_us-gaap_ClassOfStockDomain_019c9ef6-fb85-7dd7-b878-05cdaa95b9f7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019c9ef6-fb85-7108-ac1b-d547ca4ec2e0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019c9ef6-fb85-7dd7-b878-05cdaa95b9f7" xlink:to="loc_us-gaap_ClassOfStockDomain_019c9ef6-fb85-7108-ac1b-d547ca4ec2e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019c9ef6-fb85-7f5a-ad3a-c82905ba0607" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019c9ef6-fb85-7108-ac1b-d547ca4ec2e0" xlink:to="loc_us-gaap_CommonStockMember_019c9ef6-fb85-7f5a-ad3a-c82905ba0607" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_019c9ef8-6f32-78a2-9eb4-8d075b9f78a6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019c9ef6-fb85-7108-ac1b-d547ca4ec2e0" xlink:to="loc_us-gaap_RestrictedStockMember_019c9ef8-6f32-78a2-9eb4-8d075b9f78a6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiarySaleOfStockAxis_019c9ef6-fb85-7486-b2b2-02bbcc3d2400" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsidiarySaleOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ClassOfWarrantOrRightTable_c205afba-c290-44c2-85b4-d99722ffc9d2" xlink:to="loc_us-gaap_SubsidiarySaleOfStockAxis_019c9ef6-fb85-7486-b2b2-02bbcc3d2400" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019c9ef6-fb85-7486-b2b2-02bbcc3d2400_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_019c9ef6-fb85-7486-b2b2-02bbcc3d2400" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019c9ef6-fb85-7486-b2b2-02bbcc3d2400_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019c9ef6-fb85-79c0-92a8-5c615cb7a2cd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_019c9ef6-fb85-7486-b2b2-02bbcc3d2400" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019c9ef6-fb85-79c0-92a8-5c615cb7a2cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrivatePlacementMember_019c9ef6-fb85-7c5f-8308-b312850c4b6e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrivatePlacementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019c9ef6-fb85-79c0-92a8-5c615cb7a2cd" xlink:to="loc_us-gaap_PrivatePlacementMember_019c9ef6-fb85-7c5f-8308-b312850c4b6e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_EquityDistributionAgreementMember_019c9ef9-7ce2-75bc-a28d-cd9811e47d10" xlink:href="patr-20251231.xsd#patr_EquityDistributionAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019c9ef6-fb85-79c0-92a8-5c615cb7a2cd" xlink:to="loc_patr_EquityDistributionAgreementMember_019c9ef9-7ce2-75bc-a28d-cd9811e47d10" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightAxis_019c9ef6-fb85-7576-97af-d5141dbc7bc0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ClassOfWarrantOrRightTable_c205afba-c290-44c2-85b4-d99722ffc9d2" xlink:to="loc_us-gaap_ClassOfWarrantOrRightAxis_019c9ef6-fb85-7576-97af-d5141dbc7bc0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_019c9ef6-fb85-7576-97af-d5141dbc7bc0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_019c9ef6-fb85-7576-97af-d5141dbc7bc0" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_019c9ef6-fb85-7576-97af-d5141dbc7bc0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_019c9ef6-fb85-7a9a-834b-00ce6be872a5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_019c9ef6-fb85-7576-97af-d5141dbc7bc0" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_019c9ef6-fb85-7a9a-834b-00ce6be872a5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_RepresentativesWarrantMember_019c9ef6-fb85-76ef-bf09-ae45f9e654cd" xlink:href="patr-20251231.xsd#patr_RepresentativesWarrantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_019c9ef6-fb85-7a9a-834b-00ce6be872a5" xlink:to="loc_patr_RepresentativesWarrantMember_019c9ef6-fb85-76ef-bf09-ae45f9e654cd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_JulyPreFundedWarrantsAndInvestorWarrantsMember_019c9ef6-fb85-7af7-92a9-6b5703204b9e" xlink:href="patr-20251231.xsd#patr_JulyPreFundedWarrantsAndInvestorWarrantsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_019c9ef6-fb85-7a9a-834b-00ce6be872a5" xlink:to="loc_patr_JulyPreFundedWarrantsAndInvestorWarrantsMember_019c9ef6-fb85-7af7-92a9-6b5703204b9e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_JulyPreFundedWarrantsMember_019c9ef6-fb85-7e11-a565-e8af558166f0" xlink:href="patr-20251231.xsd#patr_JulyPreFundedWarrantsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_patr_JulyPreFundedWarrantsAndInvestorWarrantsMember_019c9ef6-fb85-7af7-92a9-6b5703204b9e" xlink:to="loc_patr_JulyPreFundedWarrantsMember_019c9ef6-fb85-7e11-a565-e8af558166f0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_JulyInvestorWarrantsMember_019c9ef6-fb85-7e41-bf9b-72fb8fe2adc0" xlink:href="patr-20251231.xsd#patr_JulyInvestorWarrantsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_patr_JulyPreFundedWarrantsAndInvestorWarrantsMember_019c9ef6-fb85-7af7-92a9-6b5703204b9e" xlink:to="loc_patr_JulyInvestorWarrantsMember_019c9ef6-fb85-7e41-bf9b-72fb8fe2adc0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_AugustPreFundedWarrantsInvestorWarrantsAndExchangeWarrantsMember_019c9ef7-7ff7-711d-ac44-4640ac0af970" xlink:href="patr-20251231.xsd#patr_AugustPreFundedWarrantsInvestorWarrantsAndExchangeWarrantsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_019c9ef6-fb85-7a9a-834b-00ce6be872a5" xlink:to="loc_patr_AugustPreFundedWarrantsInvestorWarrantsAndExchangeWarrantsMember_019c9ef7-7ff7-711d-ac44-4640ac0af970" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_AugustPreFundedWarrantsAndInvestorWarrantsMember_019c9ef6-fb85-7032-a725-a4aff733e4a2" xlink:href="patr-20251231.xsd#patr_AugustPreFundedWarrantsAndInvestorWarrantsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_patr_AugustPreFundedWarrantsInvestorWarrantsAndExchangeWarrantsMember_019c9ef7-7ff7-711d-ac44-4640ac0af970" xlink:to="loc_patr_AugustPreFundedWarrantsAndInvestorWarrantsMember_019c9ef6-fb85-7032-a725-a4aff733e4a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_AugustPreFundedWarrantsMember_019c9ef6-fb85-75e8-ac7b-ffba3f02d2a6" xlink:href="patr-20251231.xsd#patr_AugustPreFundedWarrantsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_patr_AugustPreFundedWarrantsAndInvestorWarrantsMember_019c9ef6-fb85-7032-a725-a4aff733e4a2" xlink:to="loc_patr_AugustPreFundedWarrantsMember_019c9ef6-fb85-75e8-ac7b-ffba3f02d2a6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_AugustInvestorWarrantsMember_019c9ef6-fb85-7986-ad16-13c6b99538bd" xlink:href="patr-20251231.xsd#patr_AugustInvestorWarrantsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_patr_AugustPreFundedWarrantsAndInvestorWarrantsMember_019c9ef6-fb85-7032-a725-a4aff733e4a2" xlink:to="loc_patr_AugustInvestorWarrantsMember_019c9ef6-fb85-7986-ad16-13c6b99538bd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_AugustExchangeWarrantsMember_019c9ef6-fb85-73f5-9d4c-29705d69d666" xlink:href="patr-20251231.xsd#patr_AugustExchangeWarrantsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_patr_AugustPreFundedWarrantsInvestorWarrantsAndExchangeWarrantsMember_019c9ef7-7ff7-711d-ac44-4640ac0af970" xlink:to="loc_patr_AugustExchangeWarrantsMember_019c9ef6-fb85-73f5-9d4c-29705d69d666" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_KVWarrantsMember_019c9ef7-cd01-7c12-b76c-f5db856ac087" xlink:href="patr-20251231.xsd#patr_KVWarrantsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_019c9ef6-fb85-7a9a-834b-00ce6be872a5" xlink:to="loc_patr_KVWarrantsMember_019c9ef7-cd01-7c12-b76c-f5db856ac087" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_MagnaWarrantMember_019c9ef9-3c06-73f3-a4bf-2b1a0ac1f8eb" xlink:href="patr-20251231.xsd#patr_MagnaWarrantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_019c9ef6-fb85-7a9a-834b-00ce6be872a5" xlink:to="loc_patr_MagnaWarrantMember_019c9ef9-3c06-73f3-a4bf-2b1a0ac1f8eb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeAxis_019c9ef6-fb85-764d-8f8a-d478e5d2e623" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ClassOfWarrantOrRightTable_c205afba-c290-44c2-85b4-d99722ffc9d2" xlink:to="loc_us-gaap_ShortTermDebtTypeAxis_019c9ef6-fb85-764d-8f8a-d478e5d2e623" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_019c9ef6-fb85-764d-8f8a-d478e5d2e623_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_019c9ef6-fb85-764d-8f8a-d478e5d2e623" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_019c9ef6-fb85-764d-8f8a-d478e5d2e623_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_019c9ef6-fb85-7233-9efc-9fe806bcb71b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_019c9ef6-fb85-764d-8f8a-d478e5d2e623" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_019c9ef6-fb85-7233-9efc-9fe806bcb71b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleNotesPayableMember_019c9ef6-fb85-7025-99c9-6b51ce3ddd93" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConvertibleNotesPayableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtTypeDomain_019c9ef6-fb85-7233-9efc-9fe806bcb71b" xlink:to="loc_us-gaap_ConvertibleNotesPayableMember_019c9ef6-fb85-7025-99c9-6b51ce3ddd93" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019c9ef7-cd01-7233-bac8-33f39101653d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ClassOfWarrantOrRightTable_c205afba-c290-44c2-85b4-d99722ffc9d2" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019c9ef7-cd01-7233-bac8-33f39101653d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019c9ef7-cd01-7233-bac8-33f39101653d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019c9ef7-cd01-7233-bac8-33f39101653d" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019c9ef7-cd01-7233-bac8-33f39101653d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019c9ef7-cd01-7423-be0e-87b979cf84d6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019c9ef7-cd01-7233-bac8-33f39101653d" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019c9ef7-cd01-7423-be0e-87b979cf84d6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_VayuRoboticsInc.Member_019c9ef7-cd01-7b00-bd7d-4494936c697e" xlink:href="patr-20251231.xsd#patr_VayuRoboticsInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019c9ef7-cd01-7423-be0e-87b979cf84d6" xlink:to="loc_patr_VayuRoboticsInc.Member_019c9ef7-cd01-7b00-bd7d-4494936c697e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_019c9ef7-cd01-7561-bbd1-5f141d5d2f88" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityInterestIssuedOrIssuableByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ClassOfWarrantOrRightTable_c205afba-c290-44c2-85b4-d99722ffc9d2" xlink:to="loc_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_019c9ef7-cd01-7561-bbd1-5f141d5d2f88" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_019c9ef7-cd01-7561-bbd1-5f141d5d2f88_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityInterestIssuedOrIssuableTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_019c9ef7-cd01-7561-bbd1-5f141d5d2f88" xlink:to="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_019c9ef7-cd01-7561-bbd1-5f141d5d2f88_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_019c9ef7-cd01-7758-be7d-c85e9ddf6f71" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityInterestIssuedOrIssuableTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_019c9ef7-cd01-7561-bbd1-5f141d5d2f88" xlink:to="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_019c9ef7-cd01-7758-be7d-c85e9ddf6f71" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_CommonStockUpfrontConsiderationMember_019c9ef7-cd01-707e-9d7a-d913f341d526" xlink:href="patr-20251231.xsd#patr_CommonStockUpfrontConsiderationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_019c9ef7-cd01-7758-be7d-c85e9ddf6f71" xlink:to="loc_patr_CommonStockUpfrontConsiderationMember_019c9ef7-cd01-707e-9d7a-d913f341d526" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_CommonStockFutureEarnoutConsiderationMember_019c9ef7-cd01-7b4f-b292-d037bfac3d45" xlink:href="patr-20251231.xsd#patr_CommonStockFutureEarnoutConsiderationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_019c9ef7-cd01-7758-be7d-c85e9ddf6f71" xlink:to="loc_patr_CommonStockFutureEarnoutConsiderationMember_019c9ef7-cd01-7b4f-b292-d037bfac3d45" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_019c9ef7-f56c-7c1d-a2e3-f6bcb332063c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ClassOfWarrantOrRightTable_c205afba-c290-44c2-85b4-d99722ffc9d2" xlink:to="loc_us-gaap_PlanNameAxis_019c9ef7-f56c-7c1d-a2e3-f6bcb332063c" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019c9ef7-f56c-7c1d-a2e3-f6bcb332063c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_019c9ef7-f56c-7c1d-a2e3-f6bcb332063c" xlink:to="loc_us-gaap_PlanNameDomain_019c9ef7-f56c-7c1d-a2e3-f6bcb332063c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019c9ef7-f56c-7a47-9d56-5a8d826c4974" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_019c9ef7-f56c-7c1d-a2e3-f6bcb332063c" xlink:to="loc_us-gaap_PlanNameDomain_019c9ef7-f56c-7a47-9d56-5a8d826c4974" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_Vayu2022EquityIncentivePlanMember_019c9ef7-f56c-7737-8c43-78cb99f4a24f" xlink:href="patr-20251231.xsd#patr_Vayu2022EquityIncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019c9ef7-f56c-7a47-9d56-5a8d826c4974" xlink:to="loc_patr_Vayu2022EquityIncentivePlanMember_019c9ef7-f56c-7737-8c43-78cb99f4a24f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_TwoThousandAndTwentyThreeEquityIncentivePlanMemberMember_019c9ef8-1a58-72cd-ad91-98b2fb857bb5" xlink:href="patr-20251231.xsd#patr_TwoThousandAndTwentyThreeEquityIncentivePlanMemberMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019c9ef7-f56c-7a47-9d56-5a8d826c4974" xlink:to="loc_patr_TwoThousandAndTwentyThreeEquityIncentivePlanMemberMember_019c9ef8-1a58-72cd-ad91-98b2fb857bb5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_TwoThousandAndTwentyThreeEquityIncentivePlanMember_019c9ef8-1a58-77e0-b736-3dcf39bec1b1" xlink:href="patr-20251231.xsd#patr_TwoThousandAndTwentyThreeEquityIncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019c9ef7-f56c-7a47-9d56-5a8d826c4974" xlink:to="loc_patr_TwoThousandAndTwentyThreeEquityIncentivePlanMember_019c9ef8-1a58-77e0-b736-3dcf39bec1b1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_Vayu2025EquityIncentivePlanMember_019c9ef8-3780-7eba-989b-1d270bc8eb33" xlink:href="patr-20251231.xsd#patr_Vayu2025EquityIncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019c9ef7-f56c-7a47-9d56-5a8d826c4974" xlink:to="loc_patr_Vayu2025EquityIncentivePlanMember_019c9ef8-3780-7eba-989b-1d270bc8eb33" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019c9ef8-3780-70cf-817e-427d9f2cab2c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ClassOfWarrantOrRightTable_c205afba-c290-44c2-85b4-d99722ffc9d2" xlink:to="loc_us-gaap_AwardTypeAxis_019c9ef8-3780-70cf-817e-427d9f2cab2c" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c9ef8-3780-70cf-817e-427d9f2cab2c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019c9ef8-3780-70cf-817e-427d9f2cab2c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c9ef8-3780-70cf-817e-427d9f2cab2c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c9ef8-3780-7c71-a6ae-c86336499f9c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019c9ef8-3780-70cf-817e-427d9f2cab2c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c9ef8-3780-7c71-a6ae-c86336499f9c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_019c9ef8-3780-7309-9ecc-6fd5d0ed8e9c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c9ef8-3780-7c71-a6ae-c86336499f9c" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_019c9ef8-3780-7309-9ecc-6fd5d0ed8e9c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_019c9ef8-6f32-785d-9f39-7bbc1b089ca6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c9ef8-3780-7c71-a6ae-c86336499f9c" xlink:to="loc_us-gaap_RestrictedStockMember_019c9ef8-6f32-785d-9f39-7bbc1b089ca6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019c9efc-bc1e-73e3-ab42-bbeee2e6892c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c9ef8-3780-7c71-a6ae-c86336499f9c" xlink:to="loc_us-gaap_CommonStockMember_019c9efc-bc1e-73e3-ab42-bbeee2e6892c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_019c9ef8-c281-7ae7-bd9a-bf7cb18a2f02" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c9ef8-3780-7c71-a6ae-c86336499f9c" xlink:to="loc_us-gaap_PerformanceSharesMember_019c9ef8-c281-7ae7-bd9a-bf7cb18a2f02" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantMember_019c9ef9-3c06-76b2-94a2-38f2ef8e304f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c9ef8-3780-7c71-a6ae-c86336499f9c" xlink:to="loc_us-gaap_WarrantMember_019c9ef9-3c06-76b2-94a2-38f2ef8e304f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019c9ef8-3780-7015-a0ed-61591afb137d" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ClassOfWarrantOrRightTable_c205afba-c290-44c2-85b4-d99722ffc9d2" xlink:to="loc_dei_LegalEntityAxis_019c9ef8-3780-7015-a0ed-61591afb137d" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019c9ef8-3780-7015-a0ed-61591afb137d_default" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019c9ef8-3780-7015-a0ed-61591afb137d" xlink:to="loc_dei_EntityDomain_019c9ef8-3780-7015-a0ed-61591afb137d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019c9ef8-3780-7774-99d9-de94dbbdb85f" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019c9ef8-3780-7015-a0ed-61591afb137d" xlink:to="loc_dei_EntityDomain_019c9ef8-3780-7774-99d9-de94dbbdb85f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_VayuRoboticsInc.Member_019c9ef8-3780-7459-b342-06e07087d1a6" xlink:href="patr-20251231.xsd#patr_VayuRoboticsInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019c9ef8-3780-7774-99d9-de94dbbdb85f" xlink:to="loc_patr_VayuRoboticsInc.Member_019c9ef8-3780-7459-b342-06e07087d1a6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019c9ef8-9a51-7528-9255-82dc0c29ec1f" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ClassOfWarrantOrRightTable_c205afba-c290-44c2-85b4-d99722ffc9d2" xlink:to="loc_srt_RangeAxis_019c9ef8-9a51-7528-9255-82dc0c29ec1f" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c9ef8-9a51-7528-9255-82dc0c29ec1f_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019c9ef8-9a51-7528-9255-82dc0c29ec1f" xlink:to="loc_srt_RangeMember_019c9ef8-9a51-7528-9255-82dc0c29ec1f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c9ef8-9a51-7f7d-a96c-9afe96077bcf" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019c9ef8-9a51-7528-9255-82dc0c29ec1f" xlink:to="loc_srt_RangeMember_019c9ef8-9a51-7f7d-a96c-9afe96077bcf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019c9ef8-9a51-76e6-88e1-ff614e54ddb5" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019c9ef8-9a51-7f7d-a96c-9afe96077bcf" xlink:to="loc_srt_MinimumMember_019c9ef8-9a51-76e6-88e1-ff614e54ddb5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019c9ef8-9a51-7da9-a6d0-98d199207947" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019c9ef8-9a51-7f7d-a96c-9afe96077bcf" xlink:to="loc_srt_MaximumMember_019c9ef8-9a51-7da9-a6d0-98d199207947" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingAxis_019c9ef8-c281-7969-834c-1cf76f99f4c2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VestingAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ClassOfWarrantOrRightTable_c205afba-c290-44c2-85b4-d99722ffc9d2" xlink:to="loc_us-gaap_VestingAxis_019c9ef8-c281-7969-834c-1cf76f99f4c2" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_019c9ef8-c281-7969-834c-1cf76f99f4c2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VestingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VestingAxis_019c9ef8-c281-7969-834c-1cf76f99f4c2" xlink:to="loc_us-gaap_VestingDomain_019c9ef8-c281-7969-834c-1cf76f99f4c2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_019c9ef8-c281-739a-9573-4933101d5919" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VestingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VestingAxis_019c9ef8-c281-7969-834c-1cf76f99f4c2" xlink:to="loc_us-gaap_VestingDomain_019c9ef8-c281-739a-9573-4933101d5919" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationAwardTrancheOneMember_019c9ef8-c281-70b8-a78c-f0900f54fc4c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationAwardTrancheOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_019c9ef8-c281-739a-9573-4933101d5919" xlink:to="loc_us-gaap_ShareBasedCompensationAwardTrancheOneMember_019c9ef8-c281-70b8-a78c-f0900f54fc4c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationAwardTrancheTwoMember_019c9ef8-c281-7b54-9006-87c503009e3a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationAwardTrancheTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_019c9ef8-c281-739a-9573-4933101d5919" xlink:to="loc_us-gaap_ShareBasedCompensationAwardTrancheTwoMember_019c9ef8-c281-7b54-9006-87c503009e3a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_CommonStockVotingRightsNumberOfVotes_019c9ef6-fb85-7a59-ad84-481b7304583c" xlink:href="patr-20251231.xsd#patr_CommonStockVotingRightsNumberOfVotes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_patr_CommonStockVotingRightsNumberOfVotes_019c9ef6-fb85-7a59-ad84-481b7304583c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesAuthorized_019c9ef6-fb85-78be-af72-89c1c6b57e2b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_PreferredStockSharesAuthorized_019c9ef6-fb85-78be-af72-89c1c6b57e2b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockParOrStatedValuePerShare_019c9ef6-fb85-7bae-bf90-460b7f5011ae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_PreferredStockParOrStatedValuePerShare_019c9ef6-fb85-7bae-bf90-460b7f5011ae" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_019c9ef6-fb85-79aa-98fd-431810dbf920" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_019c9ef6-fb85-79aa-98fd-431810dbf920" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_019c9ef6-fb85-747e-a815-44c1356468aa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_019c9ef6-fb85-747e-a815-44c1356468aa" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_019c9ef6-fb85-754c-8afe-89026b030e97" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_019c9ef6-fb85-754c-8afe-89026b030e97" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockConsiderationReceivedOnTransaction_019c9ef6-fb85-7f49-910b-d302157a0f99" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockConsiderationReceivedOnTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_SaleOfStockConsiderationReceivedOnTransaction_019c9ef6-fb85-7f49-910b-d302157a0f99" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockPricePerShare_019c9ef7-7ff7-710e-8a84-b8367be6b56e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockPricePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_SaleOfStockPricePerShare_019c9ef7-7ff7-710e-8a84-b8367be6b56e" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts_019c9ef6-fb85-7eca-b871-780c2c593adf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts_019c9ef6-fb85-7eca-b871-780c2c593adf" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_019c9ef6-fb85-7684-b063-9e63285f1ff5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_019c9ef6-fb85-7684-b063-9e63285f1ff5" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_019c9ef6-fb85-7b4c-9120-a5d4d34ce84a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_019c9ef6-fb85-7b4c-9120-a5d4d34ce84a" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtConversionConvertedInstrumentSharesIssued1_019c9ef6-fb85-7f43-83d4-f15169751223" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtConversionConvertedInstrumentSharesIssued1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_DebtConversionConvertedInstrumentSharesIssued1_019c9ef6-fb85-7f43-83d4-f15169751223" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_019c9ef6-fb85-7651-97c1-1063aa3387ee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentConvertibleConversionPrice1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_019c9ef6-fb85-7651-97c1-1063aa3387ee" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight_019c9ef6-fb85-7e18-8371-0c7d36b08529" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight_019c9ef6-fb85-7e18-8371-0c7d36b08529" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_019c9ef6-fb85-7001-89a4-23a593db8ab3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_019c9ef6-fb85-7001-89a4-23a593db8ab3" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_ClassOfWarrantOrRightPurchasePriceOfWarrantsOrRights_019c9ef6-fb85-72c6-9bac-eaf01689531d" xlink:href="patr-20251231.xsd#patr_ClassOfWarrantOrRightPurchasePriceOfWarrantsOrRights"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_patr_ClassOfWarrantOrRightPurchasePriceOfWarrantsOrRights_019c9ef6-fb85-72c6-9bac-eaf01689531d" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfWarrants_019c9ef6-fb85-7fd1-9085-730e9d5c2376" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceOfWarrants"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfWarrants_019c9ef6-fb85-7fd1-9085-730e9d5c2376" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantsAndRightsOutstandingTerm_019c9ef7-2ea8-7651-a11d-ea3348e4da1d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantsAndRightsOutstandingTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_WarrantsAndRightsOutstandingTerm_019c9ef7-2ea8-7651-a11d-ea3348e4da1d" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfPrivatePlacement_019c9ef7-cd01-7fd9-a4d4-073e6a8716c1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceOfPrivatePlacement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfPrivatePlacement_019c9ef7-cd01-7fd9-a4d4-073e6a8716c1" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_019c9ef7-cd01-7bee-83d7-732579080c50" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_019c9ef7-cd01-7bee-83d7-732579080c50" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsPeriodOfVolumeWeightedAveragePriceOfSecurities_019cbab0-12ee-76db-b4cb-82793ac53c29" xlink:href="patr-20251231.xsd#patr_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsPeriodOfVolumeWeightedAveragePriceOfSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_patr_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsPeriodOfVolumeWeightedAveragePriceOfSecurities_019cbab0-12ee-76db-b4cb-82793ac53c29" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesAcquisitions_019c9ef7-cd01-765f-85c6-cda66d1e63d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesAcquisitions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesAcquisitions_019c9ef7-cd01-765f-85c6-cda66d1e63d7" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_019c9ef7-f56c-77df-9c54-86a9708addda" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_019c9ef7-f56c-77df-9c54-86a9708addda" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_019c9ef7-f56c-7f4d-914f-7444df727b64" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_019c9ef7-f56c-7f4d-914f-7444df727b64" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_PercentageOfCommonStockIssuedAndOutstanding_019c9ef8-1a58-73b4-8c1d-d8483d4f0c5f" xlink:href="patr-20251231.xsd#patr_PercentageOfCommonStockIssuedAndOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_patr_PercentageOfCommonStockIssuedAndOutstanding_019c9ef8-1a58-73b4-8c1d-d8483d4f0c5f" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ExcessStockSharesIssued_019c9ef8-1a58-7013-8861-e764173c534e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ExcessStockSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_ExcessStockSharesIssued_019c9ef8-1a58-7013-8861-e764173c534e" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_019c9ef8-1a58-79cc-99b5-5d9e274ea115" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_019c9ef8-1a58-79cc-99b5-5d9e274ea115" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorizedPotential_019c9ef8-3780-78b8-a54a-913c96c3b95c" xlink:href="patr-20251231.xsd#patr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorizedPotential"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_patr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorizedPotential_019c9ef8-3780-78b8-a54a-913c96c3b95c" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_SharesOfRestrictedCommonStockIssued_019c9ef8-6f32-704a-9a39-fd25010ec381" xlink:href="patr-20251231.xsd#patr_SharesOfRestrictedCommonStockIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_patr_SharesOfRestrictedCommonStockIssued_019c9ef8-6f32-704a-9a39-fd25010ec381" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_RestrictedCommonStockForRecourseNotes_019c9ef8-6f32-7bde-b4a9-23dd8621d60f" xlink:href="patr-20251231.xsd#patr_RestrictedCommonStockForRecourseNotes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_patr_RestrictedCommonStockForRecourseNotes_019c9ef8-6f32-7bde-b4a9-23dd8621d60f" xlink:type="arc" order="29"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityNoteSubscriptionsReceivable_019c9ef8-6f32-7157-aacf-1f955f180434" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityNoteSubscriptionsReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_StockholdersEquityNoteSubscriptionsReceivable_019c9ef8-6f32-7157-aacf-1f955f180434" xlink:type="arc" order="30"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_RestrictedStockAwardLiability_019c9ef8-6f32-75eb-a8b9-642bb0863d7a" xlink:href="patr-20251231.xsd#patr_RestrictedStockAwardLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_patr_RestrictedStockAwardLiability_019c9ef8-6f32-75eb-a8b9-642bb0863d7a" xlink:type="arc" order="31"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_ShareBasedCompensationArrangementByShareBasedPaymentAwardRecourseDebtForgivenNumberOfLoans_019c9ef8-6f32-71a4-a8bb-d24270a8ae8a" xlink:href="patr-20251231.xsd#patr_ShareBasedCompensationArrangementByShareBasedPaymentAwardRecourseDebtForgivenNumberOfLoans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_patr_ShareBasedCompensationArrangementByShareBasedPaymentAwardRecourseDebtForgivenNumberOfLoans_019c9ef8-6f32-71a4-a8bb-d24270a8ae8a" xlink:type="arc" order="32"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019c9ef8-6f32-7a46-8be1-a427c7a88bd9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019c9ef8-6f32-7a46-8be1-a427c7a88bd9" xlink:type="arc" order="33"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_ShareBasedPaymentArrangementExpenseChangeInClassification_019c9ef8-6f32-79c6-ae7b-0dcc4cc762b3" xlink:href="patr-20251231.xsd#patr_ShareBasedPaymentArrangementExpenseChangeInClassification"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_patr_ShareBasedPaymentArrangementExpenseChangeInClassification_019c9ef8-6f32-79c6-ae7b-0dcc4cc762b3" xlink:type="arc" order="34"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019c9ef8-6f32-7944-9a4d-b3364264289c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019c9ef8-6f32-7944-9a4d-b3364264289c" xlink:type="arc" order="35"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019c9ef8-3780-7795-8ac5-1928dfc49078" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019c9ef8-3780-7795-8ac5-1928dfc49078" xlink:type="arc" order="36"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_019c9ef8-9a51-744a-86f9-821511bce275" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_019c9ef8-9a51-744a-86f9-821511bce275" xlink:type="arc" order="37"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAcquiredInPeriod_019c9ef8-9a51-7817-8ac0-d81f15abfb59" xlink:href="patr-20251231.xsd#patr_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAcquiredInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_patr_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAcquiredInPeriod_019c9ef8-9a51-7817-8ac0-d81f15abfb59" xlink:type="arc" order="38"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_019c9ef8-c281-7df1-a969-aacbeba686a1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_019c9ef8-c281-7df1-a969-aacbeba686a1" xlink:type="arc" order="39"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_019c9ef8-c281-7e1f-b4e9-81a5effc4b1d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_019c9ef8-c281-7e1f-b4e9-81a5effc4b1d" xlink:type="arc" order="40"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodGrantDateFairValue_019c9ef8-c281-7659-8339-bf73bbd0950f" xlink:href="patr-20251231.xsd#patr_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_patr_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodGrantDateFairValue_019c9ef8-c281-7659-8339-bf73bbd0950f" xlink:type="arc" order="41"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_019c9ef8-fef4-793a-bed9-21f0f6dd71f2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_019c9ef8-fef4-793a-bed9-21f0f6dd71f2" xlink:type="arc" order="42"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_019cc4dd-393e-7e22-99f5-873ed6df4a1b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_019cc4dd-393e-7e22-99f5-873ed6df4a1b" xlink:type="arc" order="43"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum_019cc4de-9c1d-7790-bd4c-4a438227c468" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum_019cc4de-9c1d-7790-bd4c-4a438227c468" xlink:type="arc" order="44"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_019c9ef8-fef4-744b-8160-bdd4ac1c3978" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_019c9ef8-fef4-744b-8160-bdd4ac1c3978" xlink:type="arc" order="45"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_019c9ef8-fef4-785d-a653-b7037e2834c4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_019c9ef8-fef4-785d-a653-b7037e2834c4" xlink:type="arc" order="46"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_019c9ef8-fef4-7b20-b013-3b9e01c7538e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_019c9ef8-fef4-7b20-b013-3b9e01c7538e" xlink:type="arc" order="47"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue_019c9ef8-fef4-7754-868d-d367a21ef9e3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue_019c9ef8-fef4-7754-868d-d367a21ef9e3" xlink:type="arc" order="48"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms_019c9ef9-3c06-7ab7-8684-eb6f79a56399" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms_019c9ef9-3c06-7ab7-8684-eb6f79a56399" xlink:type="arc" order="49"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesIssued_019c9ef9-3c06-7e02-88ce-ba85bef83bd3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_SharesIssued_019c9ef9-3c06-7e02-88ce-ba85bef83bd3" xlink:type="arc" order="50"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_ClassOfWarrantOrRightNumberOfTranches_019c9ef9-3c06-765a-aed4-3b43047038e5" xlink:href="patr-20251231.xsd#patr_ClassOfWarrantOrRightNumberOfTranches"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_patr_ClassOfWarrantOrRightNumberOfTranches_019c9ef9-3c06-765a-aed4-3b43047038e5" xlink:type="arc" order="51"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_SaleOfStockMaximumGrossProceeds_019c9ef9-7ce2-7782-b36b-2b439d94725f" xlink:href="patr-20251231.xsd#patr_SaleOfStockMaximumGrossProceeds"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_patr_SaleOfStockMaximumGrossProceeds_019c9ef9-7ce2-7782-b36b-2b439d94725f" xlink:type="arc" order="52"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_SaleOfStockCommissionRate_019c9ef9-7ce2-729a-94fd-a190574d9c13" xlink:href="patr-20251231.xsd#patr_SaleOfStockCommissionRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_patr_SaleOfStockCommissionRate_019c9ef9-7ce2-729a-94fd-a190574d9c13" xlink:type="arc" order="53"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_019c9ef9-7ce2-7fb0-8e85-be241aa75d92" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_019c9ef9-7ce2-7fb0-8e85-be241aa75d92" xlink:type="arc" order="54"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfStockIssuanceCosts_019c9ef9-7ce2-7acf-8c69-0ef329fe202d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfStockIssuanceCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_us-gaap_PaymentsOfStockIssuanceCosts_019c9ef9-7ce2-7acf-8c69-0ef329fe202d" xlink:type="arc" order="55"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_SaleOfStockRemainingCapacityAvailableForIssuance_019c9ef9-f011-75b4-8581-166fab3d16de" xlink:href="patr-20251231.xsd#patr_SaleOfStockRemainingCapacityAvailableForIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_9ae8477e-1c8d-46f2-8145-a562dbb3a5ad" xlink:to="loc_patr_SaleOfStockRemainingCapacityAvailableForIssuance_019c9ef9-f011-75b4-8581-166fab3d16de" xlink:type="arc" order="56"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.patriciaacquisitioncorp.com/role/STOCKHOLDERSEQUITYDEFICITScheduleofRestrictedCommonStockRestrictedStockUnitsandPerformanceBasedRestrictedStockActivityDetails" xlink:type="simple" xlink:href="patr-20251231.xsd#STOCKHOLDERSEQUITYDEFICITScheduleofRestrictedCommonStockRestrictedStockUnitsandPerformanceBasedRestrictedStockActivityDetails"/>
  <link:definitionLink xlink:role="http://www.patriciaacquisitioncorp.com/role/STOCKHOLDERSEQUITYDEFICITScheduleofRestrictedCommonStockRestrictedStockUnitsandPerformanceBasedRestrictedStockActivityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7f31cbc1-170e-47f4-9129-873956333301" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_7a947506-30a1-4112-bf37-da28e64f2864" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7f31cbc1-170e-47f4-9129-873956333301" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_7a947506-30a1-4112-bf37-da28e64f2864" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_f284f916-1309-412f-bb0f-9d274835e9cf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_7a947506-30a1-4112-bf37-da28e64f2864" xlink:to="loc_us-gaap_AwardTypeAxis_f284f916-1309-412f-bb0f-9d274835e9cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f284f916-1309-412f-bb0f-9d274835e9cf_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_f284f916-1309-412f-bb0f-9d274835e9cf" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f284f916-1309-412f-bb0f-9d274835e9cf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_d2c55b64-9e22-4f37-97b8-5a8068f667c9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_f284f916-1309-412f-bb0f-9d274835e9cf" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_d2c55b64-9e22-4f37-97b8-5a8068f667c9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_45e1824c-2074-43f1-992c-c04b7bbc1a45" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_d2c55b64-9e22-4f37-97b8-5a8068f667c9" xlink:to="loc_us-gaap_RestrictedStockMember_45e1824c-2074-43f1-992c-c04b7bbc1a45" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_b9e3c123-af12-43c1-a3ba-b8bbfb52bc24" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_d2c55b64-9e22-4f37-97b8-5a8068f667c9" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_b9e3c123-af12-43c1-a3ba-b8bbfb52bc24" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_019b5b44-1b83-765a-b875-93f6563ae891" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_d2c55b64-9e22-4f37-97b8-5a8068f667c9" xlink:to="loc_us-gaap_PerformanceSharesMember_019b5b44-1b83-765a-b875-93f6563ae891" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_82247834-53cb-4db4-b3a8-e7afbf323d1f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7f31cbc1-170e-47f4-9129-873956333301" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_82247834-53cb-4db4-b3a8-e7afbf323d1f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_b5b3f5c7-82e1-49f6-b983-4c43247986cf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_82247834-53cb-4db4-b3a8-e7afbf323d1f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_b5b3f5c7-82e1-49f6-b983-4c43247986cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_827832cc-8551-45ec-9ed9-6460cc55536f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_82247834-53cb-4db4-b3a8-e7afbf323d1f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_827832cc-8551-45ec-9ed9-6460cc55536f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_ee77055e-03bf-40e2-aa73-f7a70077f38d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_82247834-53cb-4db4-b3a8-e7afbf323d1f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_ee77055e-03bf-40e2-aa73-f7a70077f38d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_484fe398-40e2-45d2-b1be-87c206d7c7b5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_82247834-53cb-4db4-b3a8-e7afbf323d1f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_484fe398-40e2-45d2-b1be-87c206d7c7b5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_aab2f2ad-52ad-4a4d-8d89-a91a1ce282b1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_b0b3e960-337b-4be4-ae20-fdc6557bde63" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7f31cbc1-170e-47f4-9129-873956333301" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_b0b3e960-337b-4be4-ae20-fdc6557bde63" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_e69b94b9-d0b7-455d-b602-577e3cc320b8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_b0b3e960-337b-4be4-ae20-fdc6557bde63" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_e69b94b9-d0b7-455d-b602-577e3cc320b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_0bac40c5-8eb4-4e70-9a64-d5ef37c1990f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_b0b3e960-337b-4be4-ae20-fdc6557bde63" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_0bac40c5-8eb4-4e70-9a64-d5ef37c1990f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_cbd8f0b2-6d10-49ee-b5d5-05202e8d8734" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_b0b3e960-337b-4be4-ae20-fdc6557bde63" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_cbd8f0b2-6d10-49ee-b5d5-05202e8d8734" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_3fdabb11-7ade-4d4c-9389-9c7952f32a66" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_b0b3e960-337b-4be4-ae20-fdc6557bde63" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_3fdabb11-7ade-4d4c-9389-9c7952f32a66" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_55412d3a-64f1-40d6-94ae-6d7321114d87" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.patriciaacquisitioncorp.com/role/STOCKHOLDERSEQUITYDEFICITScheduleofWarrantsDetails" xlink:type="simple" xlink:href="patr-20251231.xsd#STOCKHOLDERSEQUITYDEFICITScheduleofWarrantsDetails"/>
  <link:definitionLink xlink:role="http://www.patriciaacquisitioncorp.com/role/STOCKHOLDERSEQUITYDEFICITScheduleofWarrantsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_118d3269-fa6f-4fa9-b595-b0474f3cf34a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_fcf94674-9537-4871-9b83-16a26993770d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_118d3269-fa6f-4fa9-b595-b0474f3cf34a" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_fcf94674-9537-4871-9b83-16a26993770d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_8647f85f-5d85-4646-bc85-38f9166c2370" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_fcf94674-9537-4871-9b83-16a26993770d" xlink:to="loc_us-gaap_AwardTypeAxis_8647f85f-5d85-4646-bc85-38f9166c2370" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8647f85f-5d85-4646-bc85-38f9166c2370_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_8647f85f-5d85-4646-bc85-38f9166c2370" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8647f85f-5d85-4646-bc85-38f9166c2370_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_33f7ebec-c08c-43b8-ab00-f27d0b55a8bc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_8647f85f-5d85-4646-bc85-38f9166c2370" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_33f7ebec-c08c-43b8-ab00-f27d0b55a8bc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantMember_2d51be41-6c68-4970-8cd1-4a3954213e91" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_33f7ebec-c08c-43b8-ab00-f27d0b55a8bc" xlink:to="loc_us-gaap_WarrantMember_2d51be41-6c68-4970-8cd1-4a3954213e91" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_a41dc994-506a-4285-86ca-e24b79ccf000" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_118d3269-fa6f-4fa9-b595-b0474f3cf34a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_a41dc994-506a-4285-86ca-e24b79ccf000" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_b1fff0a2-4411-4bee-861b-c08c577ecb2a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_a41dc994-506a-4285-86ca-e24b79ccf000" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_b1fff0a2-4411-4bee-861b-c08c577ecb2a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_837eb535-f868-451f-8ea5-cfb61f220ad9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_a41dc994-506a-4285-86ca-e24b79ccf000" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_837eb535-f868-451f-8ea5-cfb61f220ad9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercised_a1cd26c9-644e-4bff-9cee-ea281c9fd96a" xlink:href="patr-20251231.xsd#patr_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_a41dc994-506a-4285-86ca-e24b79ccf000" xlink:to="loc_patr_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercised_a1cd26c9-644e-4bff-9cee-ea281c9fd96a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_2d938d4f-778f-422f-9605-9e0e3633cf22" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_a41dc994-506a-4285-86ca-e24b79ccf000" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_2d938d4f-778f-422f-9605-9e0e3633cf22" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_9490d185-87ce-4169-ad6e-a8fdf906582c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisable_87e0b273-08be-44c3-8add-19b57dc735f2" xlink:href="patr-20251231.xsd#patr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_118d3269-fa6f-4fa9-b595-b0474f3cf34a" xlink:to="loc_patr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisable_87e0b273-08be-44c3-8add-19b57dc735f2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_87bd9a50-132e-445c-adfd-c9fdd01ce380" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_118d3269-fa6f-4fa9-b595-b0474f3cf34a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_87bd9a50-132e-445c-adfd-c9fdd01ce380" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_a7d8b76e-9f3b-412a-81a6-b70ead72223a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_87bd9a50-132e-445c-adfd-c9fdd01ce380" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_a7d8b76e-9f3b-412a-81a6-b70ead72223a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_5681295a-5d79-4651-b9fc-ea777253622b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_87bd9a50-132e-445c-adfd-c9fdd01ce380" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_5681295a-5d79-4651-b9fc-ea777253622b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsExercised_8b248864-bd3e-4fb8-999c-3fa9343854fa" xlink:href="patr-20251231.xsd#patr_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_87bd9a50-132e-445c-adfd-c9fdd01ce380" xlink:to="loc_patr_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsExercised_8b248864-bd3e-4fb8-999c-3fa9343854fa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_0cd9186b-a8d0-47c8-a410-3455206c394f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_87bd9a50-132e-445c-adfd-c9fdd01ce380" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_0cd9186b-a8d0-47c8-a410-3455206c394f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_5643752f-7dbd-4849-988d-183afeb942b6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsPriceExercisable_677e9ca9-d1de-46bc-b5b5-2703de8a1712" xlink:href="patr-20251231.xsd#patr_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsPriceExercisable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_118d3269-fa6f-4fa9-b595-b0474f3cf34a" xlink:to="loc_patr_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsPriceExercisable_677e9ca9-d1de-46bc-b5b5-2703de8a1712" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.patriciaacquisitioncorp.com/role/STOCKBASEDCOMPENSATIONScheduleofStockBasedCompensationExpenseDetails" xlink:type="simple" xlink:href="patr-20251231.xsd#STOCKBASEDCOMPENSATIONScheduleofStockBasedCompensationExpenseDetails"/>
  <link:definitionLink xlink:role="http://www.patriciaacquisitioncorp.com/role/STOCKBASEDCOMPENSATIONScheduleofStockBasedCompensationExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_32a482a3-fc54-449c-bddf-bb99431643ac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_a78bd3f2-b4f2-43ac-bc5e-fe8d5f108cf7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_32a482a3-fc54-449c-bddf-bb99431643ac" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_a78bd3f2-b4f2-43ac-bc5e-fe8d5f108cf7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_e9e9022c-7b18-4000-85ca-c283c94ce226" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_a78bd3f2-b4f2-43ac-bc5e-fe8d5f108cf7" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_e9e9022c-7b18-4000-85ca-c283c94ce226" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_e9e9022c-7b18-4000-85ca-c283c94ce226_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_e9e9022c-7b18-4000-85ca-c283c94ce226" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_e9e9022c-7b18-4000-85ca-c283c94ce226_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_5d4080a9-5242-4a33-8f6d-bf3fe7a2b300" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_e9e9022c-7b18-4000-85ca-c283c94ce226" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_5d4080a9-5242-4a33-8f6d-bf3fe7a2b300" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpenseMember_a267d658-14cf-4d9f-beb3-f986f20d7f20" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeneralAndAdministrativeExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_5d4080a9-5242-4a33-8f6d-bf3fe7a2b300" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpenseMember_a267d658-14cf-4d9f-beb3-f986f20d7f20" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpenseMember_2c8211a9-caa2-4ea5-bdbe-e0b77ec1ac26" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResearchAndDevelopmentExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_5d4080a9-5242-4a33-8f6d-bf3fe7a2b300" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpenseMember_2c8211a9-caa2-4ea5-bdbe-e0b77ec1ac26" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenseMember_ceca8b3c-e160-422d-9e7c-0468aafc74a4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_5d4080a9-5242-4a33-8f6d-bf3fe7a2b300" xlink:to="loc_us-gaap_OperatingExpenseMember_ceca8b3c-e160-422d-9e7c-0468aafc74a4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingAndMarketingExpenseMember_8eb88ff1-456c-426f-ae21-c4290ab3e528" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingAndMarketingExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_5d4080a9-5242-4a33-8f6d-bf3fe7a2b300" xlink:to="loc_us-gaap_SellingAndMarketingExpenseMember_8eb88ff1-456c-426f-ae21-c4290ab3e528" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_cb35c0f8-8aa2-40ca-945a-acf151a494be" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_32a482a3-fc54-449c-bddf-bb99431643ac" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_cb35c0f8-8aa2-40ca-945a-acf151a494be" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.patriciaacquisitioncorp.com/role/STOCKBASEDCOMPENSATIONNarrativeDetails" xlink:type="simple" xlink:href="patr-20251231.xsd#STOCKBASEDCOMPENSATIONNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.patriciaacquisitioncorp.com/role/STOCKBASEDCOMPENSATIONNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_afd257fd-e771-4062-8619-908dfcb6a202" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_a952fbf9-5df2-4d9c-b008-f4f508efd084" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_afd257fd-e771-4062-8619-908dfcb6a202" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_a952fbf9-5df2-4d9c-b008-f4f508efd084" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019c9f05-f3e7-7091-bfd2-daff999c2c62" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_a952fbf9-5df2-4d9c-b008-f4f508efd084" xlink:to="loc_us-gaap_AwardTypeAxis_019c9f05-f3e7-7091-bfd2-daff999c2c62" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c9f05-f3e7-7091-bfd2-daff999c2c62_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019c9f05-f3e7-7091-bfd2-daff999c2c62" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c9f05-f3e7-7091-bfd2-daff999c2c62_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c9f05-f3e7-7191-8d65-273ec92c9abe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019c9f05-f3e7-7091-bfd2-daff999c2c62" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c9f05-f3e7-7191-8d65-273ec92c9abe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_RestrictedStockUnitsRSUsAndRestrictedStockMember_019cc42c-b512-78de-ae75-fd5d56b95ce3" xlink:href="patr-20251231.xsd#patr_RestrictedStockUnitsRSUsAndRestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c9f05-f3e7-7191-8d65-273ec92c9abe" xlink:to="loc_patr_RestrictedStockUnitsRSUsAndRestrictedStockMember_019cc42c-b512-78de-ae75-fd5d56b95ce3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_019c9f05-f3e7-790f-b2e7-7f904a5bd5cc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_patr_RestrictedStockUnitsRSUsAndRestrictedStockMember_019cc42c-b512-78de-ae75-fd5d56b95ce3" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_019c9f05-f3e7-790f-b2e7-7f904a5bd5cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_019cb90e-9dab-7b87-911e-858a5a35351c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_patr_RestrictedStockUnitsRSUsAndRestrictedStockMember_019cc42c-b512-78de-ae75-fd5d56b95ce3" xlink:to="loc_us-gaap_RestrictedStockMember_019cb90e-9dab-7b87-911e-858a5a35351c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_019c9f05-f3e7-708c-997c-39fa11d39ff0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c9f05-f3e7-7191-8d65-273ec92c9abe" xlink:to="loc_us-gaap_EmployeeStockOptionMember_019c9f05-f3e7-708c-997c-39fa11d39ff0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019c9f05-f3e7-77bf-8d5e-8ae5245a515f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_afd257fd-e771-4062-8619-908dfcb6a202" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019c9f05-f3e7-77bf-8d5e-8ae5245a515f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_019cbbfc-9432-77eb-a35c-60fcd0de71eb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_afd257fd-e771-4062-8619-908dfcb6a202" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_019cbbfc-9432-77eb-a35c-60fcd0de71eb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_019c9f05-f3e7-7c34-b5c8-6ad6ec7437ce" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_afd257fd-e771-4062-8619-908dfcb6a202" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_019c9f05-f3e7-7c34-b5c8-6ad6ec7437ce" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions_019cbbf7-c733-7909-8ebc-0d5e5163213a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_afd257fd-e771-4062-8619-908dfcb6a202" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions_019cbbf7-c733-7909-8ebc-0d5e5163213a" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.patriciaacquisitioncorp.com/role/INCOMETAXESNetDeferredTaxAssetsDetails" xlink:type="simple" xlink:href="patr-20251231.xsd#INCOMETAXESNetDeferredTaxAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.patriciaacquisitioncorp.com/role/INCOMETAXESNetDeferredTaxAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxPaidByIndividualJurisdictionLineItems_019c4c81-422a-729d-8d49-81e7d7332160" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxPaidByIndividualJurisdictionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxPaidByIndividualJurisdictionTable_019c4c80-afe0-7945-a3c8-88229afa9e32" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxPaidByIndividualJurisdictionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeTaxPaidByIndividualJurisdictionLineItems_019c4c81-422a-729d-8d49-81e7d7332160" xlink:to="loc_us-gaap_IncomeTaxPaidByIndividualJurisdictionTable_019c4c80-afe0-7945-a3c8-88229afa9e32" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_019c4c81-422a-77f4-bd96-6bfe8f7aa3c8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxAuthorityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeTaxPaidByIndividualJurisdictionTable_019c4c80-afe0-7945-a3c8-88229afa9e32" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_019c4c81-422a-77f4-bd96-6bfe8f7aa3c8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_019c4c81-422a-77f4-bd96-6bfe8f7aa3c8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_019c4c81-422a-77f4-bd96-6bfe8f7aa3c8" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_019c4c81-422a-77f4-bd96-6bfe8f7aa3c8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_019c4c81-422a-7466-befb-72ea9b6412e6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_019c4c81-422a-77f4-bd96-6bfe8f7aa3c8" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_019c4c81-422a-7466-befb-72ea9b6412e6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DomesticCountryMember_019c4c81-e3b5-7142-b9a8-13493101254f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DomesticCountryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_019c4c81-422a-7466-befb-72ea9b6412e6" xlink:to="loc_us-gaap_DomesticCountryMember_019c4c81-e3b5-7142-b9a8-13493101254f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCountryMember_019c4c82-07d5-74bd-ab50-d200a4be2014" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCountryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_019c4c81-422a-7466-befb-72ea9b6412e6" xlink:to="loc_us-gaap_ForeignCountryMember_019c4c82-07d5-74bd-ab50-d200a4be2014" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_019c4c82-a791-71b1-9d4a-606b29bf4434" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxPaidByIndividualJurisdictionLineItems_019c4c81-422a-729d-8d49-81e7d7332160" xlink:to="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_019c4c82-a791-71b1-9d4a-606b29bf4434" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.patriciaacquisitioncorp.com/role/COMMITMENTSANDCONTINGENCIESScheduleofLeaseCostsDetails" xlink:type="simple" xlink:href="patr-20251231.xsd#COMMITMENTSANDCONTINGENCIESScheduleofLeaseCostsDetails"/>
  <link:definitionLink xlink:role="http://www.patriciaacquisitioncorp.com/role/COMMITMENTSANDCONTINGENCIESScheduleofLeaseCostsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_f205753c-0a31-4716-8fe1-a37e953cb1fc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_2cf67b51-a431-4bbd-b949-dec64b97d794" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_f205753c-0a31-4716-8fe1-a37e953cb1fc" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_2cf67b51-a431-4bbd-b949-dec64b97d794" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_6551870e-b98d-431f-8b06-9ee289b2c7b3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_2cf67b51-a431-4bbd-b949-dec64b97d794" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_6551870e-b98d-431f-8b06-9ee289b2c7b3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_6551870e-b98d-431f-8b06-9ee289b2c7b3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_6551870e-b98d-431f-8b06-9ee289b2c7b3" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_6551870e-b98d-431f-8b06-9ee289b2c7b3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_43ec6fd4-2935-49b8-b0e4-9065c8008e78" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_6551870e-b98d-431f-8b06-9ee289b2c7b3" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_43ec6fd4-2935-49b8-b0e4-9065c8008e78" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherOperatingIncomeExpenseMember_019cbc57-810f-7f3e-967e-4ff5ec2ac95c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherOperatingIncomeExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_43ec6fd4-2935-49b8-b0e4-9065c8008e78" xlink:to="loc_us-gaap_OtherOperatingIncomeExpenseMember_019cbc57-810f-7f3e-967e-4ff5ec2ac95c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpenseMember_2942c08b-424b-45c7-bb43-91c2f1616b0c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResearchAndDevelopmentExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_43ec6fd4-2935-49b8-b0e4-9065c8008e78" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpenseMember_2942c08b-424b-45c7-bb43-91c2f1616b0c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpenseMember_140789c3-475b-4585-bc0e-4f21514e461e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeneralAndAdministrativeExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_43ec6fd4-2935-49b8-b0e4-9065c8008e78" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpenseMember_140789c3-475b-4585-bc0e-4f21514e461e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingAndMarketingExpenseMember_019c8e03-70dc-7695-bdd9-8a2f50b85753" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingAndMarketingExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_43ec6fd4-2935-49b8-b0e4-9065c8008e78" xlink:to="loc_us-gaap_SellingAndMarketingExpenseMember_019c8e03-70dc-7695-bdd9-8a2f50b85753" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseCost_963df2f2-5ede-45f0-b24b-eae3953e9169" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_f205753c-0a31-4716-8fe1-a37e953cb1fc" xlink:to="loc_us-gaap_OperatingLeaseCost_963df2f2-5ede-45f0-b24b-eae3953e9169" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.patriciaacquisitioncorp.com/role/SUBSEQUENTEVENTSDetails" xlink:type="simple" xlink:href="patr-20251231.xsd#SUBSEQUENTEVENTSDetails"/>
  <link:definitionLink xlink:role="http://www.patriciaacquisitioncorp.com/role/SUBSEQUENTEVENTSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventLineItems_9181e29b-166c-402c-b33a-2665404acf99" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTable_d2ccdfed-747c-4ac5-9033-676d7c786a41" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsequentEventLineItems_9181e29b-166c-402c-b33a-2665404acf99" xlink:to="loc_us-gaap_SubsequentEventTable_d2ccdfed-747c-4ac5-9033-676d7c786a41" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019cd161-615b-709e-9325-1d5b3e10a753" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_d2ccdfed-747c-4ac5-9033-676d7c786a41" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019cd161-615b-709e-9325-1d5b3e10a753" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019cd161-615b-709e-9325-1d5b3e10a753_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019cd161-615b-709e-9325-1d5b3e10a753" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019cd161-615b-709e-9325-1d5b3e10a753_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019cd161-615b-7e0b-b79c-d48674f183cb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019cd161-615b-709e-9325-1d5b3e10a753" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019cd161-615b-7e0b-b79c-d48674f183cb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_DiligentRoboticsInc.Member_019cd161-615b-75b6-9f17-c606f25e49d2" xlink:href="patr-20251231.xsd#patr_DiligentRoboticsInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019cd161-615b-7e0b-b79c-d48674f183cb" xlink:to="loc_patr_DiligentRoboticsInc.Member_019cd161-615b-75b6-9f17-c606f25e49d2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_VebuInc.Member_019cd161-8f19-7f31-87f3-669c96e656c7" xlink:href="patr-20251231.xsd#patr_VebuInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019cd161-615b-7e0b-b79c-d48674f183cb" xlink:to="loc_patr_VebuInc.Member_019cd161-8f19-7f31-87f3-669c96e656c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_019cd161-615b-77b7-83a5-3a8f3f35bc9b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_d2ccdfed-747c-4ac5-9033-676d7c786a41" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_019cd161-615b-77b7-83a5-3a8f3f35bc9b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019cd161-615b-77b7-83a5-3a8f3f35bc9b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019cd161-615b-77b7-83a5-3a8f3f35bc9b" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019cd161-615b-77b7-83a5-3a8f3f35bc9b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019cd161-615b-71ac-9103-593e5fc93807" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019cd161-615b-77b7-83a5-3a8f3f35bc9b" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019cd161-615b-71ac-9103-593e5fc93807" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_019cd161-615b-76a8-a9be-ef42fcce7a85" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_019cd161-615b-71ac-9103-593e5fc93807" xlink:to="loc_us-gaap_SubsequentEventMember_019cd161-615b-76a8-a9be-ef42fcce7a85" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_019cd161-615b-7004-a66e-09d92303568f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityInterestIssuedOrIssuableByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_d2ccdfed-747c-4ac5-9033-676d7c786a41" xlink:to="loc_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_019cd161-615b-7004-a66e-09d92303568f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_019cd161-615b-7004-a66e-09d92303568f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityInterestIssuedOrIssuableTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_019cd161-615b-7004-a66e-09d92303568f" xlink:to="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_019cd161-615b-7004-a66e-09d92303568f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_019cd161-615b-7829-a5e8-0222887fc9bb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityInterestIssuedOrIssuableTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_019cd161-615b-7004-a66e-09d92303568f" xlink:to="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_019cd161-615b-7829-a5e8-0222887fc9bb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019cd161-615b-7815-9f43-892faeaf608a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_019cd161-615b-7829-a5e8-0222887fc9bb" xlink:to="loc_us-gaap_CommonStockMember_019cd161-615b-7815-9f43-892faeaf608a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_CommonStockFutureEarnoutConsiderationMember_019cd161-615b-7341-b6f5-73e46523e2dd" xlink:href="patr-20251231.xsd#patr_CommonStockFutureEarnoutConsiderationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_019cd161-615b-7829-a5e8-0222887fc9bb" xlink:to="loc_patr_CommonStockFutureEarnoutConsiderationMember_019cd161-615b-7341-b6f5-73e46523e2dd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019cd461-eb78-7622-a948-6031c1b0c021" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_d2ccdfed-747c-4ac5-9033-676d7c786a41" xlink:to="loc_us-gaap_AwardTypeAxis_019cd461-eb78-7622-a948-6031c1b0c021" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cd461-eb78-7622-a948-6031c1b0c021_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019cd461-eb78-7622-a948-6031c1b0c021" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cd461-eb78-7622-a948-6031c1b0c021_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cd462-7ddf-7866-aeb2-ba4e35befbee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019cd461-eb78-7622-a948-6031c1b0c021" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cd462-7ddf-7866-aeb2-ba4e35befbee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_019cd462-7ddf-7409-afca-321154e363a7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cd462-7ddf-7866-aeb2-ba4e35befbee" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_019cd462-7ddf-7409-afca-321154e363a7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_019cd161-615b-77cf-9df6-690f72f24b58" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationConsiderationTransferred1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_9181e29b-166c-402c-b33a-2665404acf99" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_019cd161-615b-77cf-9df6-690f72f24b58" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred_019cd161-615b-7d6a-8d28-f70bc3d40c64" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_9181e29b-166c-402c-b33a-2665404acf99" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred_019cd161-615b-7d6a-8d28-f70bc3d40c64" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_019cd161-615b-7350-9e29-5c0d37072abd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquireBusinessesGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_9181e29b-166c-402c-b33a-2665404acf99" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_019cd161-615b-7350-9e29-5c0d37072abd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_019cd161-615b-7de7-b525-eab06ea46d29" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_9181e29b-166c-402c-b33a-2665404acf99" xlink:to="loc_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_019cd161-615b-7de7-b525-eab06ea46d29" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_BusinessCombinationEquityInterestAcquiredShares_019cd161-615b-7aec-89ea-71411e54b719" xlink:href="patr-20251231.xsd#patr_BusinessCombinationEquityInterestAcquiredShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_9181e29b-166c-402c-b33a-2665404acf99" xlink:to="loc_patr_BusinessCombinationEquityInterestAcquiredShares_019cd161-615b-7aec-89ea-71411e54b719" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_BusinessCombinationStockConversionRatio_019cd161-8f19-7a6b-a15f-f5a9ea96dc10" xlink:href="patr-20251231.xsd#patr_BusinessCombinationStockConversionRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_9181e29b-166c-402c-b33a-2665404acf99" xlink:to="loc_patr_BusinessCombinationStockConversionRatio_019cd161-8f19-7a6b-a15f-f5a9ea96dc10" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned_019cd161-8f19-752f-937f-1b56cfcd6265" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_9181e29b-166c-402c-b33a-2665404acf99" xlink:to="loc_us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned_019cd161-8f19-752f-937f-1b56cfcd6265" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_BusinessCombinationConsiderationTransferredEquityInterestShareIssuedEqualToPercentageOfNetProceedsInEarnoutPeriod_019cd161-8f19-7e44-9466-28057880637d" xlink:href="patr-20251231.xsd#patr_BusinessCombinationConsiderationTransferredEquityInterestShareIssuedEqualToPercentageOfNetProceedsInEarnoutPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_9181e29b-166c-402c-b33a-2665404acf99" xlink:to="loc_patr_BusinessCombinationConsiderationTransferredEquityInterestShareIssuedEqualToPercentageOfNetProceedsInEarnoutPeriod_019cd161-8f19-7e44-9466-28057880637d" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="simple" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-roles-2025.xsd#eedm"/>
  <link:definitionLink xlink:role="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapital"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract" xlink:to="loc_us-gaap_AdditionalPaidInCapital" xlink:type="arc" order="31"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://xbrl.sec.gov/ecd/role/IndividualsOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#IndividualsOnly"/>
  <link:definitionLink xlink:role="http://xbrl.sec.gov/ecd/role/IndividualsOnly" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AllIndividualsMember" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_AllIndividualsMember"/>
    <link:loc xlink:type="locator" xlink:label="loc_patr_EuanAbrahamMember_9c7de4ab-e33a-4dae-8100-fa0b674afec7" xlink:href="patr-20251231.xsd#patr_EuanAbrahamMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ecd_AllIndividualsMember" xlink:to="loc_patr_EuanAbrahamMember_9c7de4ab-e33a-4dae-8100-fa0b674afec7" xlink:type="arc" order="2"/>
  </link:definitionLink>
</link:linkbase>
